They don’t or rather they don’t need to. Because they have a narrow field of view and their panels are not angled.
Older games doesn’t support slanted view ports which is needed for the pimax but there is no way to tell if they do or not. so manual input for parallel projection.
But we all could feed the VR Game Library, in which game supports parallel projection or not. So it’s basically a lookup table for the pitool, and based on the Library it will enable it or not.
yes I asked the same question months ago. They just need a profile per game. Like oculus tray tool. When I get my pimax , if they dont have that feature I will program it myself.