Single GPU passthrough Framework 13 (AMD)

I am trying to passthrough the iGPU from my Framework 13 (AMD) to a Windows VM.
The host system is running EndeavourOS and I already set up the system as described in some single GPU passthrough tutorials but the Windows VM is not starting. The screen gets dark and stays dark.

It seems that the amdgpu driver cannot get unbound.
Has anyone already tested this scenario?

Have you managed to dump the vbios?

Yes I dumped it and added the rom location to the xml.

Can you post it somewhere and i’ll try and see how I faire.