I've been able to run all of my other regular games since switching to Pop!_OS, but one is giving me a problem still, Space Engineers.
Tried all of the Protons (and Proton-GE), tried various launch options, read all of the feedback left on protondb website for the game, looking for any other ideas. :)
Had similar issues. If you jump onto the developers discord there is a Linux section, it has detailed instructions pinned on how to get it to work perfectly!
So far no joy. The Linux channel and posts haven’t been able to crack this nut. New version of Pop OS coming soon based on Ubuntu 24.04, will try again after the update. :)
I'm pretty sure it's the steam version (it was purchased from there... The game worked fine until suddenly it didn't anymore, and troubleshooting hasn't been fruitful)
Maybe log out of Steam and sign back in again (I remember CSGO had that happen to me and this step fixed it), updating your computer and packages, restart your computer, uninstall and reinstall the game.