I see.
1)For starters I would assume that Most China custom display to be not
compatible with the fedora ARM.
Secondly, its probably safe to assume that any decent projector that support
1080p with 60fps and if stereo audio works properly
I would propose that we test and assume that the kernel
as shown in
https://discussion.fedoraproject.org/t/research-and-updating-of-docs-for-hdmi-display-supported-supported-hdmi-driver-by-rasp-pi-4-in-fedora-workstation/80059
it would be great to update the docs which tell users which drivers or display
is supported.
or how to get the driver