I'd also like to mention here that pci-e is disabled in the Fedora image on RP64. I don't understand the details, but Fedora uses some kernel argument that conflicts with a known bug in the kernel for rockchip CPUs, but has not been pushed into the kernel by RockChip.bill see what details I can dig up later.
https://bugzilla.redhat.com/show_bug.cgi?id=1704945
https://bugzilla.redhat.com/show_bug.cgi?id=1704945