FHEM MQTT devices don't show up in devices

Configuration
1

I have MQTT Mosquitto broker running on my HAS.
MQTT explorer shows registration of my FHEM devices (MQTT-Client and Bridge configured)
But I don’t see any devices in “Devices” or “Entities”.

The topics I see on the broker are sourced by FHEM and ar ENOCEAN devices connected to FHEM.

Sorry for the silly questions I’m new at HAS.
Any hint for me?

2

You will need to create a mqtt sensor in HA and point this to the relevant Mqtt topic

3

I intend to migrate to HA and keep my old FS20 hardware. Do I need to manually add all of these equipment one by one into HA or can FHEM globally export these?