>>304908041
Well it's functional. Turns out only the player IK and bullets are synced. Your player's body has physics you can interact with the world in each other's games but you have no way of knowing where things are actually moving when you push them. You can't grab and pick up objects on their screen but running into a door will open it because your body colliders will push it.
Tricky to get used to and there was a lot of "does this work for you?" being asked when we tried things but it's definitely worth giving a try if you have the game already.