Just got back in to VR after I upgraded my card from GTS 1660 to an RTX 3060ti and have the same issue as OP. (although I'm running a Quest2).
Loaded up Open XR but see it's no longer supported.
Hoping to find some other solution here because I feel like a giant in the 172. Kinda cool that when I stand up I literally poke my head above the aircraft and get the breeze in my face, but not very realistic... 😉