I was using Manjaro KDE and ended up switching to Pop OS because Manjaro would never work right with my GPU. Pop OS has worked very well out of the box though.
I chose Manjaro KDE as one of the SteamVR requirements is KDE Plasma. It’s required because it has a DRM function to allow SteamVR to take ownership of the DisplayPort.
A quick google search says that PopOS is Gnome based. But KDE can be installed over it? I might give it a go.