Okay @PoMpIs,
I have done some changes to @ExtremeXT's EFI file which should help such as enabled the (expected) PTXH USB renames, added -no_compat_check (to get past the EB|LOG:EXITBS:START), rearranged the kexts (Lilu/WEG, AMDRyzenCPUPowerManagement was not loading first before...