thanks to JonP I was able to load the rom the custom vbios and it's working again.
however, stability issues are happening, if I run one VM it works perfectly, but everytime I run at least two of them they will often completly crash.
an example: If I run two VM and close/shutdown VM 1, VM 2 will instantly crash (not shutdown just like force stop)
or sometimes if I run a graphics application on one of the VM they will all instantly crash.
I never had this problem in 6.19, maybe it's a driver issue since I had to reinstall every graphics drivers after upgrading.