Need Sound alert after device start

I have a problem when I press the wireless switch, the light of switch comes on but the device doesn’t work. I have to press and hold or press multiple times. And the problem is that I don’t know when the device is working while the device is far from the switch. I would like to be notified by sound that the device is now working. Thank you.

What device?
Notified how and where should this notification appear?

would a phone notification be okay? You can already do that by setting a scene to send a notification, but maybe if the light is on the relay is broken or a wire Is loose.