I had a Pico 4 VR headset for a while, and there’s this software called UEVR (I think that was the name) that lets you turn any Unreal Engine (I think 4 and 5)game into steresocopic 3D. It wasn’t plug and play and you had to tinker quite a bit, but it was doable. I played most of Trepang2 this way and it was great. This was done by a single person IIRC, I believe Valve could do something even better if they get to it.