I'm having trouble figuring out how to get it to work on itch.io games.  I thought I'd start with the Wolfenstein 3D game to try it out, but I'm not sure where to start.  The only google search results seem to talk about Steam VR and the Windows Store for Mixed Reality.

But seeing as that Wolfenstein 3D game is on itch.io, there should be another way but I don't know what it is.

https://further-beyond.itch.io/wolf3dvr

Anyone got any advice?