I'm trying to install BigSur on my PC, opencore configured with all kexts, ACPI etc. Boot to installation and then freezes at the time the intallation starts, after I select installation drive. I'm not sure if my GPU RX570 is not compatible with BigSur and doesn't get hardware acceleration, seems that graphics are slow and not smooth.
On Catalina everything works good, with no extra mods other that the AMD usual ones