Moes Zigbee BHT-006 One found by ZHA second not, but no entities

I just installed two Moes BHT-006 Zigbee Thermostats. One did only connect to the SmartHome App from Tuya, requesting Wifi access, so looks like a packaging error, because tried a few timers to pair with my Yellow and ZHA, but no success.
The other one did connect via ZHA, but now there are only the LQI and RSSI devices… So not even a switch, let alone the thermometer, or temperature settings entity. Any hint, how to get it to properly couple with HA?
Merry Christmas to you all!