I’m so done with win11, and currently 12 of my 15 machines are linux anyway, but AFAIK HDR (on nvidia gpu) is still impossible? Are you guys all on AMD or just not using hdr for gaming/media? So instead of relying on outdated info, just asking the pros :)
I do know that Valve have been working closely with KDE to get it working there. So you should check if you’re on the latest Plasma desktop and you probably need Wayland.
Beyond that I have no idea. I don’t have any HDR capable device.
With no device it sure won’t phase you at all :) I do really regret having made the hdr-switch back then.