MSI MAG B550 Tomahawk

Hey, I got a problem.. my system doesn’t want me to install MacOS Monterey or Ventura.. Big Sur doesn’t support my GPU (RX 6600) so I have to update but I don’t know what kind of problem this could be.. I need help and i hope someone can help me. I am trying it since a week now and don't have any success..

System:

Motherboard: MSI MAG B550 Tomahawk CPU: Ryzen 5 3600 GPU: RX 6600 8GB

Thanks