Can’t set OpenXR as standard

When I go to set OpenXR on standard, nothing happens. And I have been doing stuff inte he registry and a lots more, but nothing seems to work. I am drowning in desperate need of help. Because I want to play my steamVR games but I can’t. And when I play without OpenXR on standard which I can’t put it on it just lag and crashes. So my 100€ went to waste. I spent 100€ on games I can’t even play. Well done, well done. Pls help me as quickly as possible!