Looks like it's available as a flatpak https://flathub.org/apps/org.freedesktop.Platform.VulkanLayer.gamescope
Do other games launch and run fine? My two cents is I had to switch to arch (endeavor OS) with my 5600X3D and 3080 to get games to run at all, didn't have much luck with PopOS
I have not tried to run a ton of games, but so far, Darktide runs pretty much as well as I could have expected, and helldivers 2 runs great too, but so far I have not found a way to play it twice without reinstalling it. I have a weird issue with V rising displaying some debug texture in the main menu but other than that it has no major issue either.
Idk what you tried with pop OS, and you probably don't need this advice anymore, but I do have a somewhat similar setup (7900X 3D, 3080 Ti) and I couldn't get anything to run without the 550 drivers (I had the 470 version installed by default) nor the flatpak version of Steam, in case that helps anyone seeing this.
I gave PopOS a shot 2 months ago, just the latest nvidia iso from the time, not sure which display manager but having better luck now with Wayland and KDE 6. I do run dual 1440p 144Hz VRR monitors and I think most Linux OSs struggle with that, hoping to try Nvidia driver 555 with explicit sync.
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