Thank you everybody who tried!
but Awww! All these comments are so disappointing :( lol.
I develop on a Gen 1 Vive so I couldn't test on anything else, but that's probably not the problem.
My guess is it's overtaxing the system. I have an object pool of gameobjects that might be allocating too much memory. I'm sure there's a more performant variable to use. That pool is enabling 10 particles every 0.1 seconds.
I did reign it in to where I could play it. My video card is a RTX 3080 and I have 32GB RAM. Not flexing, I just have no frame of reference for thy typical machine. If someone has a machine that they feel should be able to run it, LMK. I imagine it's more likely me being an inefficient noob than OpenXR not handling a different platform.
Thanks again, Everybody!