FC does not return any telemetry

Backstory:
I bought a Mamba h743v4 to do some autonomous navigation a while ago and got ardupilot to work. Unfortunately things came up and I set that project to the side. Now I wanted to try again but I can’t get arudpilot to work anymore.

Current status:
ardupilot has previously worked, to the extent that I remember, I did nothing differently this time
currently betaflight works (I can get telemetry and spin motors)
ardupilot currently installs, I can connect it to mission planer with mavlink and edit parameters from the full parameters list but that is it, can’t spin motors, even no gyro data

What I tried:
multiple reinstalls and flashes, solutions by chatgpt, none of them helped

hardware:
I have diatone mamba h743 fc.

software:
Ardupilot 4.5.7
Mission planer 1.3.82

I have been at it for a while and haven’t gotten anywhere. If anybody has an idea whats wrong or what should I do next then please tell me.
I included some screenshots from mission planer.



reply was deleted
previously:
That could be a possible reason, but when I tried a while ago I got ardupilot to work on the same hardware. The issue is that ardupilot no longer works on the same fc.

Where did u find multiple versions of a mamba fc with H743? The only one I have found is the mamba mk4 H743v2 (which I also have).