diff --git a/homeassistant/components/mqtt/__init__.py b/homeassistant/components/mqtt/__init__.py
index 6fd288a86cf..a099e7b580c 100644
--- a/homeassistant/components/mqtt/__init__.py
+++ b/homeassistant/components/mqtt/__init__.py
@@ -28,14 +28,12 @@ from homeassistant.data_entry_flow import BaseServiceInfo
 from homeassistant.exceptions import TemplateError, Unauthorized
 from homeassistant.helpers import config_validation as cv, event, template
 from homeassistant.helpers.device_registry import DeviceEntry
-from homeassistant.helpers.dispatcher import (
-    async_dispatcher_connect,
-    async_dispatcher_send,
-)
+from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.reload import (
     async_integration_yaml_config,
-    async_setup_reload_service,
+    async_reload_integration_platforms,
 )
+from homeassistant.helpers.service import async_register_admin_service
 from homeassistant.helpers.typing import ConfigType
 
 # Loading the config flow file will register the flow
@@ -78,10 +76,10 @@ from .const import (  # noqa: F401
     DOMAIN,
     MQTT_CONNECTED,
     MQTT_DISCONNECTED,
-    MQTT_RELOADED,
     PLATFORMS,
     RELOADABLE_PLATFORMS,
 )
+from .mixins import async_discover_yaml_entities
 from .models import (  # noqa: F401
     MqttCommandTemplate,
     MqttValueTemplate,
@@ -241,7 +239,9 @@ async def _async_config_entry_updated(hass: HomeAssistant, entry: ConfigEntry) -
         await _async_setup_discovery(hass, mqtt_client.conf, entry)
 
 
-async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
+async def async_setup_entry(  # noqa: C901
+    hass: HomeAssistant, entry: ConfigEntry
+) -> bool:
     """Load a config entry."""
     # Merge basic configuration, and add missing defaults for basic options
     _merge_basic_config(hass, entry, hass.data.get(DATA_MQTT_CONFIG, {}))
@@ -378,16 +378,32 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     hass.data[DATA_CONFIG_ENTRY_LOCK] = asyncio.Lock()
     hass.data[CONFIG_ENTRY_IS_SETUP] = set()
 
-    # Setup reload service. Once support for legacy config is removed in 2022.9, we
-    # should no longer call async_setup_reload_service but instead implement a custom
-    # service
-    await async_setup_reload_service(hass, DOMAIN, RELOADABLE_PLATFORMS)
+    async def async_setup_reload_service() -> None:
+        """Create the reload service for the MQTT domain."""
+        if hass.services.has_service(DOMAIN, SERVICE_RELOAD):
+            return
 
-    async def _async_reload_platforms(_: Event | None) -> None:
-        """Discover entities for a platform."""
-        config_yaml = await async_integration_yaml_config(hass, DOMAIN) or {}
-        hass.data[DATA_MQTT_UPDATED_CONFIG] = config_yaml.get(DOMAIN, {})
-        async_dispatcher_send(hass, MQTT_RELOADED)
+        async def _reload_config(call: ServiceCall) -> None:
+            """Reload the platforms."""
+            # Reload the legacy yaml platform
+            await async_reload_integration_platforms(hass, DOMAIN, RELOADABLE_PLATFORMS)
+
+            # Reload the modern yaml platforms
+            config_yaml = await async_integration_yaml_config(hass, DOMAIN) or {}
+            hass.data[DATA_MQTT_UPDATED_CONFIG] = config_yaml.get(DOMAIN, {})
+            await asyncio.gather(
+                *(
+                    [
+                        async_discover_yaml_entities(hass, component)
+                        for component in RELOADABLE_PLATFORMS
+                    ]
+                )
+            )
+
+            # Fire event
+            hass.bus.async_fire(f"event_{DOMAIN}_reloaded", context=call.context)
+
+        async_register_admin_service(hass, DOMAIN, SERVICE_RELOAD, _reload_config)
 
     async def async_forward_entry_setup_and_setup_discovery(config_entry):
         """Forward the config entry setup to the platforms and set up discovery."""
@@ -411,21 +427,19 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
         if conf.get(CONF_DISCOVERY):
             await _async_setup_discovery(hass, conf, entry)
         # Setup reload service after all platforms have loaded
-        entry.async_on_unload(
-            hass.bus.async_listen("event_mqtt_reloaded", _async_reload_platforms)
-        )
+        await async_setup_reload_service()
+
+        if DATA_MQTT_RELOAD_NEEDED in hass.data:
+            hass.data.pop(DATA_MQTT_RELOAD_NEEDED)
+            await hass.services.async_call(
+                DOMAIN,
+                SERVICE_RELOAD,
+                {},
+                blocking=False,
+            )
 
     hass.async_create_task(async_forward_entry_setup_and_setup_discovery(entry))
 
-    if DATA_MQTT_RELOAD_NEEDED in hass.data:
-        hass.data.pop(DATA_MQTT_RELOAD_NEEDED)
-        await hass.services.async_call(
-            DOMAIN,
-            SERVICE_RELOAD,
-            {},
-            blocking=False,
-        )
-
     return True
 
 
diff --git a/homeassistant/components/mqtt/alarm_control_panel.py b/homeassistant/components/mqtt/alarm_control_panel.py
index 8e5ee54d688..b6f2f8f236e 100644
--- a/homeassistant/components/mqtt/alarm_control_panel.py
+++ b/homeassistant/components/mqtt/alarm_control_panel.py
@@ -44,8 +44,8 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
+    async_discover_yaml_entities,
     async_setup_entry_helper,
-    async_setup_platform_discovery,
     async_setup_platform_helper,
     warn_for_legacy_schema,
 )
@@ -147,9 +147,7 @@ async def async_setup_entry(
 ) -> None:
     """Set up MQTT alarm control panel through configuration.yaml and dynamically through MQTT discovery."""
     # load and initialize platform config from configuration.yaml
-    config_entry.async_on_unload(
-        await async_setup_platform_discovery(hass, alarm.DOMAIN)
-    )
+    await async_discover_yaml_entities(hass, alarm.DOMAIN)
     # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
diff --git a/homeassistant/components/mqtt/binary_sensor.py b/homeassistant/components/mqtt/binary_sensor.py
index 39fd87c8b02..9e0a049b15e 100644
--- a/homeassistant/components/mqtt/binary_sensor.py
+++ b/homeassistant/components/mqtt/binary_sensor.py
@@ -41,8 +41,8 @@ from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttAvailability,
     MqttEntity,
+    async_discover_yaml_entities,
     async_setup_entry_helper,
-    async_setup_platform_discovery,
     async_setup_platform_helper,
     warn_for_legacy_schema,
 )
@@ -102,9 +102,7 @@ async def async_setup_entry(
 ) -> None:
     """Set up MQTT binary sensor through configuration.yaml and dynamically through MQTT discovery."""
     # load and initialize platform config from configuration.yaml
-    config_entry.async_on_unload(
-        await async_setup_platform_discovery(hass, binary_sensor.DOMAIN)
-    )
+    await async_discover_yaml_entities(hass, binary_sensor.DOMAIN)
     # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
diff --git a/homeassistant/components/mqtt/button.py b/homeassistant/components/mqtt/button.py
index 0374727bf7d..b75fbe4b97f 100644
--- a/homeassistant/components/mqtt/button.py
+++ b/homeassistant/components/mqtt/button.py
@@ -25,8 +25,8 @@ from .const import (
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
+    async_discover_yaml_entities,
     async_setup_entry_helper,
-    async_setup_platform_discovery,
     async_setup_platform_helper,
     warn_for_legacy_schema,
 )
@@ -82,9 +82,7 @@ async def async_setup_entry(
 ) -> None:
     """Set up MQTT button through configuration.yaml and dynamically through MQTT discovery."""
     # load and initialize platform config from configuration.yaml
-    config_entry.async_on_unload(
-        await async_setup_platform_discovery(hass, button.DOMAIN)
-    )
+    await async_discover_yaml_entities(hass, button.DOMAIN)
     # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
diff --git a/homeassistant/components/mqtt/camera.py b/homeassistant/components/mqtt/camera.py
index 5c8d3bc48b2..69af7992229 100644
--- a/homeassistant/components/mqtt/camera.py
+++ b/homeassistant/components/mqtt/camera.py
@@ -22,8 +22,8 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
+    async_discover_yaml_entities,
     async_setup_entry_helper,
-    async_setup_platform_discovery,
     async_setup_platform_helper,
     warn_for_legacy_schema,
 )
@@ -80,9 +80,7 @@ async def async_setup_entry(
 ) -> None:
     """Set up MQTT camera through configuration.yaml and dynamically through MQTT discovery."""
     # load and initialize platform config from configuration.yaml
-    config_entry.async_on_unload(
-        await async_setup_platform_discovery(hass, camera.DOMAIN)
-    )
+    await async_discover_yaml_entities(hass, camera.DOMAIN)
     # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
diff --git a/homeassistant/components/mqtt/climate.py b/homeassistant/components/mqtt/climate.py
index a26e9cba8df..6b09891483c 100644
--- a/homeassistant/components/mqtt/climate.py
+++ b/homeassistant/components/mqtt/climate.py
@@ -50,8 +50,8 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
+    async_discover_yaml_entities,
     async_setup_entry_helper,
-    async_setup_platform_discovery,
     async_setup_platform_helper,
     warn_for_legacy_schema,
 )
@@ -391,9 +391,7 @@ async def async_setup_entry(
 ) -> None:
     """Set up MQTT climate device through configuration.yaml and dynamically through MQTT discovery."""
     # load and initialize platform config from configuration.yaml
-    config_entry.async_on_unload(
-        await async_setup_platform_discovery(hass, climate.DOMAIN)
-    )
+    await async_discover_yaml_entities(hass, climate.DOMAIN)
     # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
diff --git a/homeassistant/components/mqtt/const.py b/homeassistant/components/mqtt/const.py
index 67a9208faba..6ac77021337 100644
--- a/homeassistant/components/mqtt/const.py
+++ b/homeassistant/components/mqtt/const.py
@@ -64,7 +64,6 @@ DOMAIN = "mqtt"
 
 MQTT_CONNECTED = "mqtt_connected"
 MQTT_DISCONNECTED = "mqtt_disconnected"
-MQTT_RELOADED = "mqtt_reloaded"
 
 PAYLOAD_EMPTY_JSON = "{}"
 PAYLOAD_NONE = "None"
@@ -105,8 +104,8 @@ RELOADABLE_PLATFORMS = [
     Platform.LIGHT,
     Platform.LOCK,
     Platform.NUMBER,
-    Platform.SELECT,
     Platform.SCENE,
+    Platform.SELECT,
     Platform.SENSOR,
     Platform.SIREN,
     Platform.SWITCH,
diff --git a/homeassistant/components/mqtt/cover.py b/homeassistant/components/mqtt/cover.py
index 54ed4f2b0a0..14746329250 100644
--- a/homeassistant/components/mqtt/cover.py
+++ b/homeassistant/components/mqtt/cover.py
@@ -46,8 +46,8 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
+    async_discover_yaml_entities,
     async_setup_entry_helper,
-    async_setup_platform_discovery,
     async_setup_platform_helper,
     warn_for_legacy_schema,
 )
@@ -242,9 +242,7 @@ async def async_setup_entry(
 ) -> None:
     """Set up MQTT cover through configuration.yaml and dynamically through MQTT discovery."""
     # load and initialize platform config from configuration.yaml
-    config_entry.async_on_unload(
-        await async_setup_platform_discovery(hass, cover.DOMAIN)
-    )
+    await async_discover_yaml_entities(hass, cover.DOMAIN)
     # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
diff --git a/homeassistant/components/mqtt/fan.py b/homeassistant/components/mqtt/fan.py
index 721fa93f244..15e4a80f3e7 100644
--- a/homeassistant/components/mqtt/fan.py
+++ b/homeassistant/components/mqtt/fan.py
@@ -50,8 +50,8 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
+    async_discover_yaml_entities,
     async_setup_entry_helper,
-    async_setup_platform_discovery,
     async_setup_platform_helper,
     warn_for_legacy_schema,
 )
@@ -232,7 +232,7 @@ async def async_setup_entry(
 ) -> None:
     """Set up MQTT fan through configuration.yaml and dynamically through MQTT discovery."""
     # load and initialize platform config from configuration.yaml
-    config_entry.async_on_unload(await async_setup_platform_discovery(hass, fan.DOMAIN))
+    await async_discover_yaml_entities(hass, fan.DOMAIN)
     # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
diff --git a/homeassistant/components/mqtt/humidifier.py b/homeassistant/components/mqtt/humidifier.py
index d2856767cf0..5f09fc0d513 100644
--- a/homeassistant/components/mqtt/humidifier.py
+++ b/homeassistant/components/mqtt/humidifier.py
@@ -45,8 +45,8 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
+    async_discover_yaml_entities,
     async_setup_entry_helper,
-    async_setup_platform_discovery,
     async_setup_platform_helper,
     warn_for_legacy_schema,
 )
@@ -187,9 +187,7 @@ async def async_setup_entry(
 ) -> None:
     """Set up MQTT humidifier through configuration.yaml and dynamically through MQTT discovery."""
     # load and initialize platform config from configuration.yaml
-    config_entry.async_on_unload(
-        await async_setup_platform_discovery(hass, humidifier.DOMAIN)
-    )
+    await async_discover_yaml_entities(hass, humidifier.DOMAIN)
     # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
diff --git a/homeassistant/components/mqtt/light/__init__.py b/homeassistant/components/mqtt/light/__init__.py
index d4914cb9506..c7f3395ba4e 100644
--- a/homeassistant/components/mqtt/light/__init__.py
+++ b/homeassistant/components/mqtt/light/__init__.py
@@ -13,8 +13,8 @@ from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 from ..mixins import (
+    async_discover_yaml_entities,
     async_setup_entry_helper,
-    async_setup_platform_discovery,
     async_setup_platform_helper,
     warn_for_legacy_schema,
 )
@@ -111,9 +111,7 @@ async def async_setup_entry(
 ) -> None:
     """Set up MQTT lights configured under the light platform key (deprecated)."""
     # load and initialize platform config from configuration.yaml
-    config_entry.async_on_unload(
-        await async_setup_platform_discovery(hass, light.DOMAIN)
-    )
+    await async_discover_yaml_entities(hass, light.DOMAIN)
     # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
diff --git a/homeassistant/components/mqtt/lock.py b/homeassistant/components/mqtt/lock.py
index 1d6a40c2331..b4788f1db0c 100644
--- a/homeassistant/components/mqtt/lock.py
+++ b/homeassistant/components/mqtt/lock.py
@@ -28,8 +28,8 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
+    async_discover_yaml_entities,
     async_setup_entry_helper,
-    async_setup_platform_discovery,
     async_setup_platform_helper,
     warn_for_legacy_schema,
 )
@@ -103,9 +103,7 @@ async def async_setup_entry(
 ) -> None:
     """Set up MQTT lock through configuration.yaml and dynamically through MQTT discovery."""
     # load and initialize platform config from configuration.yaml
-    config_entry.async_on_unload(
-        await async_setup_platform_discovery(hass, lock.DOMAIN)
-    )
+    await async_discover_yaml_entities(hass, lock.DOMAIN)
     # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
diff --git a/homeassistant/components/mqtt/mixins.py b/homeassistant/components/mqtt/mixins.py
index 10fe6cb6cc5..8e59d09dfce 100644
--- a/homeassistant/components/mqtt/mixins.py
+++ b/homeassistant/components/mqtt/mixins.py
@@ -26,7 +26,7 @@ from homeassistant.const import (
     CONF_UNIQUE_ID,
     CONF_VALUE_TEMPLATE,
 )
-from homeassistant.core import CALLBACK_TYPE, Event, HomeAssistant, callback
+from homeassistant.core import Event, HomeAssistant, callback
 from homeassistant.helpers import (
     config_validation as cv,
     device_registry as dr,
@@ -69,7 +69,6 @@ from .const import (
     DOMAIN,
     MQTT_CONNECTED,
     MQTT_DISCONNECTED,
-    MQTT_RELOADED,
 )
 from .debug_info import log_message, log_messages
 from .discovery import (
@@ -261,34 +260,27 @@ class SetupEntity(Protocol):
         """Define setup_entities type."""
 
 
-async def async_setup_platform_discovery(
+async def async_discover_yaml_entities(
     hass: HomeAssistant, platform_domain: str
-) -> CALLBACK_TYPE:
-    """Set up platform discovery for manual config."""
-
-    async def _async_discover_entities() -> None:
-        """Discover entities for a platform."""
-        if DATA_MQTT_UPDATED_CONFIG in hass.data:
-            # The platform has been reloaded
-            config_yaml = hass.data[DATA_MQTT_UPDATED_CONFIG]
-        else:
-            config_yaml = hass.data.get(DATA_MQTT_CONFIG, {})
-        if not config_yaml:
-            return
-        if platform_domain not in config_yaml:
-            return
-        await asyncio.gather(
-            *(
-                discovery.async_load_platform(hass, platform_domain, DOMAIN, config, {})
-                for config in await async_get_platform_config_from_yaml(
-                    hass, platform_domain, config_yaml
-                )
+) -> None:
+    """Discover entities for a platform."""
+    if DATA_MQTT_UPDATED_CONFIG in hass.data:
+        # The platform has been reloaded
+        config_yaml = hass.data[DATA_MQTT_UPDATED_CONFIG]
+    else:
+        config_yaml = hass.data.get(DATA_MQTT_CONFIG, {})
+    if not config_yaml:
+        return
+    if platform_domain not in config_yaml:
+        return
+    await asyncio.gather(
+        *(
+            discovery.async_load_platform(hass, platform_domain, DOMAIN, config, {})
+            for config in await async_get_platform_config_from_yaml(
+                hass, platform_domain, config_yaml
             )
         )
-
-    unsub = async_dispatcher_connect(hass, MQTT_RELOADED, _async_discover_entities)
-    await _async_discover_entities()
-    return unsub
+    )
 
 
 async def async_get_platform_config_from_yaml(
diff --git a/homeassistant/components/mqtt/number.py b/homeassistant/components/mqtt/number.py
index 660ffe987f0..dc27a740720 100644
--- a/homeassistant/components/mqtt/number.py
+++ b/homeassistant/components/mqtt/number.py
@@ -41,8 +41,8 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
+    async_discover_yaml_entities,
     async_setup_entry_helper,
-    async_setup_platform_discovery,
     async_setup_platform_helper,
     warn_for_legacy_schema,
 )
@@ -135,9 +135,7 @@ async def async_setup_entry(
 ) -> None:
     """Set up MQTT number through configuration.yaml and dynamically through MQTT discovery."""
     # load and initialize platform config from configuration.yaml
-    config_entry.async_on_unload(
-        await async_setup_platform_discovery(hass, number.DOMAIN)
-    )
+    await async_discover_yaml_entities(hass, number.DOMAIN)
     # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
diff --git a/homeassistant/components/mqtt/scene.py b/homeassistant/components/mqtt/scene.py
index cc911cc3431..8b654f7cca0 100644
--- a/homeassistant/components/mqtt/scene.py
+++ b/homeassistant/components/mqtt/scene.py
@@ -22,8 +22,8 @@ from .mixins import (
     CONF_OBJECT_ID,
     MQTT_AVAILABILITY_SCHEMA,
     MqttEntity,
+    async_discover_yaml_entities,
     async_setup_entry_helper,
-    async_setup_platform_discovery,
     async_setup_platform_helper,
     warn_for_legacy_schema,
 )
@@ -79,9 +79,7 @@ async def async_setup_entry(
 ) -> None:
     """Set up MQTT scene through configuration.yaml and dynamically through MQTT discovery."""
     # load and initialize platform config from configuration.yaml
-    config_entry.async_on_unload(
-        await async_setup_platform_discovery(hass, scene.DOMAIN)
-    )
+    await async_discover_yaml_entities(hass, scene.DOMAIN)
     # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
diff --git a/homeassistant/components/mqtt/select.py b/homeassistant/components/mqtt/select.py
index 0d9f1411fd1..4c302446b19 100644
--- a/homeassistant/components/mqtt/select.py
+++ b/homeassistant/components/mqtt/select.py
@@ -30,8 +30,8 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
+    async_discover_yaml_entities,
     async_setup_entry_helper,
-    async_setup_platform_discovery,
     async_setup_platform_helper,
     warn_for_legacy_schema,
 )
@@ -94,9 +94,7 @@ async def async_setup_entry(
 ) -> None:
     """Set up MQTT select through configuration.yaml and dynamically through MQTT discovery."""
     # load and initialize platform config from configuration.yaml
-    config_entry.async_on_unload(
-        await async_setup_platform_discovery(hass, select.DOMAIN)
-    )
+    await async_discover_yaml_entities(hass, select.DOMAIN)
     # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
diff --git a/homeassistant/components/mqtt/sensor.py b/homeassistant/components/mqtt/sensor.py
index 672e22f632f..6948e173039 100644
--- a/homeassistant/components/mqtt/sensor.py
+++ b/homeassistant/components/mqtt/sensor.py
@@ -41,8 +41,8 @@ from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttAvailability,
     MqttEntity,
+    async_discover_yaml_entities,
     async_setup_entry_helper,
-    async_setup_platform_discovery,
     async_setup_platform_helper,
     warn_for_legacy_schema,
 )
@@ -147,9 +147,7 @@ async def async_setup_entry(
 ) -> None:
     """Set up MQTT sensor through configuration.yaml and dynamically through MQTT discovery."""
     # load and initialize platform config from configuration.yaml
-    config_entry.async_on_unload(
-        await async_setup_platform_discovery(hass, sensor.DOMAIN)
-    )
+    await async_discover_yaml_entities(hass, sensor.DOMAIN)
     # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
diff --git a/homeassistant/components/mqtt/siren.py b/homeassistant/components/mqtt/siren.py
index a6cff4cf91d..dfb89d2ee79 100644
--- a/homeassistant/components/mqtt/siren.py
+++ b/homeassistant/components/mqtt/siren.py
@@ -51,8 +51,8 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
+    async_discover_yaml_entities,
     async_setup_entry_helper,
-    async_setup_platform_discovery,
     async_setup_platform_helper,
     warn_for_legacy_schema,
 )
@@ -143,9 +143,7 @@ async def async_setup_entry(
 ) -> None:
     """Set up MQTT siren through configuration.yaml and dynamically through MQTT discovery."""
     # load and initialize platform config from configuration.yaml
-    config_entry.async_on_unload(
-        await async_setup_platform_discovery(hass, siren.DOMAIN)
-    )
+    await async_discover_yaml_entities(hass, siren.DOMAIN)
     # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
diff --git a/homeassistant/components/mqtt/switch.py b/homeassistant/components/mqtt/switch.py
index dadd5f86f20..b04f2433659 100644
--- a/homeassistant/components/mqtt/switch.py
+++ b/homeassistant/components/mqtt/switch.py
@@ -37,8 +37,8 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
+    async_discover_yaml_entities,
     async_setup_entry_helper,
-    async_setup_platform_discovery,
     async_setup_platform_helper,
     warn_for_legacy_schema,
 )
@@ -97,9 +97,7 @@ async def async_setup_entry(
 ) -> None:
     """Set up MQTT switch through configuration.yaml and dynamically through MQTT discovery."""
     # load and initialize platform config from configuration.yaml
-    config_entry.async_on_unload(
-        await async_setup_platform_discovery(hass, switch.DOMAIN)
-    )
+    await async_discover_yaml_entities(hass, switch.DOMAIN)
     # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
diff --git a/homeassistant/components/mqtt/vacuum/__init__.py b/homeassistant/components/mqtt/vacuum/__init__.py
index 694e9530939..c49b8cfa012 100644
--- a/homeassistant/components/mqtt/vacuum/__init__.py
+++ b/homeassistant/components/mqtt/vacuum/__init__.py
@@ -12,8 +12,8 @@ from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 from ..mixins import (
+    async_discover_yaml_entities,
     async_setup_entry_helper,
-    async_setup_platform_discovery,
     async_setup_platform_helper,
 )
 from .schema import CONF_SCHEMA, LEGACY, MQTT_VACUUM_SCHEMA, STATE
@@ -91,9 +91,7 @@ async def async_setup_entry(
 ) -> None:
     """Set up MQTT vacuum through configuration.yaml and dynamically through MQTT discovery."""
     # load and initialize platform config from configuration.yaml
-    config_entry.async_on_unload(
-        await async_setup_platform_discovery(hass, vacuum.DOMAIN)
-    )
+    await async_discover_yaml_entities(hass, vacuum.DOMAIN)
     # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry