Tpose in vrchat means you have entered vrchat’s full body calibration. Press both triggers on the controllers at the same time to lock in calibration. Load a new avatar to enter calibration again.
If your trackers show up fine in steamvr but not in game, make sure that vrchat has focus in steamvr. This means that if the steamvr dashboard is open, you need to close it before the game loads otherwise no tracker information will be sent to vrchat, and you will have to restart the game.