FHEM MQTT devices don't show up in devices

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?

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

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?