Given that it’s Valve, Index should do all games in STEAM …if developer for that game supported it.
I had no issues with launching IL2 or DCS (stand alone exe). But I don’t know how to do RoboRecall (sold only on Oculus Store) with Index.
So far I’ve spend some time in “The Lab” “Beat Saber”, “Sword and Magic?” and DCS/IL2.