Fuck those guys. I really wish LG would support DP a bit more in their products.

Nope, you’re running into the dreaded AMD HDMI 2.1 limitation. The situation just sucks.

VR is one the aspects of Linux gaming that is still weak unfortunately. The Quest line of headsets for example just don’t work. On Quest 2 and Quest 3 you may have some success using ALVR, which is a remote streaming solution over wifi.

You’re probably running in non-RGB 4:4:4. Quick test is to have some red console text against a gray background and if the text is fuzzy with compression artifacts at the edges, then it is not 4:4:4. You can check what mode your TV is in by clicking the green button with the two dots seven times.