I did ...
It, I figured it out with my limited “quick” understanding (Z2M) and I’m happy about it.
It proves, that the HomeAssistant RPi images are flawed in the moment, I didn’t figure that part out, but would have needed it for testing only. So I gave up on it.
My back tingled again, I hope it will leave me alone, I’m in a quite good place at the moment.