There’s a My Games page in PiTool, which might eventually work that way. In SteamVR settings, there is a option to configure individual games and apps.
The reality is that VR is very demanding of your PC and everyone’s PC is different (unlike consoles), so optimizing settings per-game is generally a good idea, so that you can balance performance with visual quality. This applies to all VR headsets, but it applies especially to the 5K+ and 8K headsets because of the high resolution and large field of view. That’s what makes the Pimax headsets special, but it also requires a commitment to tweaking settings for the best experience.
If you ask on the forum about recommended settings for a particular game, it’s likely someone will help guide you. There is a wiki (linked at the top of the forum) and there’s a spreadsheet with games and recommended settings. It’s still fairly rough, but it’s getting better.