I can only select images. And if I try to force it by switching select app to one that does not support content filters then video is converted to image.

This post is more of a loose question. I can play the game just fine without RT. But still if the hardware is there and performance (As I can see in Windows) can also be good then it might be worth trying to solve this issue.

I tried AMDVLK but then the whole PC crashed when launching the game...
Fingers crossed for RADV then.

Thanks! Those are pretty ok numbers imo! For an AMD's first gen RT card 40 FPS in 1440p is very ok. Ghostwire should be less demanding so it also should have around 40 FPS or more.

With Proton it should perform just as well

Exactly! It should, from what I heard Wine/Proton/Mesa developers strive to keep performance as close as possible to native or if possible even surpass it. So every time game doesn't run as well on Wine like it does on Windows there is something that can be improved.
I don't know anything about programming GPU drivers but I want to help with debugging as much as I can.