I had some time ago connected a Sonoff Tasmota. It was not connected few weeks. Added it hen in Lovelace as an entity so I can turn it ON/OFF. Wanted to create an automation, but there is no device under MQTT. I have entity for that, but no device. For automation need to use device.
Entered setoption19 1, checked Logging values, updated device list for Mosquitto. Why I can´t see the device?
I can’t answer why it’s not in your devices list (however I don’t have any MQTT devices either in my devices list either so it’s probably normal…) but why do you have to use a device in the automation instead of the entity?