Latitude 7400 2in1 no UHD620 graphics acceleration

Hey,

Trying to get BigSur to work properly on a 7400 2 in 1 but got stuck on the graphics part. Tried everything already on the WEG documentation, adding device-id to suggested by them ends up in blackscreen. Adding their fix for blackscreen ends up in Kernel Panic.

Any suggestions on how to debug/fix this issue?

Thanks