u sideload its pretty easy heres how to do it:
1. Download sidequest desktop app from the official website
3. connect ur quest 2 to ur pc using cable (not sure how to do it airlink)
4. in the top right click "install apk from folder on computer"
5. select the roxyvr.apk and wait for it to finish
6. in ur quest go to library, unknown sources and launch it
that should be it lmk if u need more help