Unfortunately, the movement/launching controls don't work on a Valve Index w/ Valve Index Controllers + SteamVR. The left thumbstick only lets me snap turn. Neither thumbstick lets me move. The jump and launch object buttons don't work either for the Valve Index controller (the A/B buttons don't do anything on either controller). In Unreal, were you using a Meta-Oculus-only framework?
I can just snap turn, grab the gravity gun, and shoot the beam to grab the box. I'll try it on a Quest 3 with link later if I get a chance.