Yeah I used URP, it was weird on Unity play mode, was smooth as ever. But when I finally built it, it ran like crap, was too late to change. When I've done the other jams I didn't use URP and had way more things involved in the game and they run fine.
Gotta say the rest of what you say is pretty dickish considering it's a vr jam where people are learning and may not have all the time in world to work on this. What game did you submit?