available to switchmate (#17640)

homeassistant/components/switch/switchmate.py

@@ -52,6 +52,11 @@ class Switchmate(SwitchDevice):
         """Return a unique, HASS-friendly identifier for this entity."""
         return self._mac.replace(':', '')
 
+    @property
+    def available(self) -> bool:
+        """Return True if entity is available."""
+        return self._device.available
+
     @property
     def name(self) -> str:
         """Return the name of the switch."""