It'll show up once its linked to your account, which these days seems to be when it reaches some point in the manufacturing line. It'll show your VIN. You would probably know your VIN by the time it shows up, but sometimes, it will be the first place you see it. Mine just showed up today. But I already knew my VIN (I already signed my final MVPA) and I'm told its being built this week and ready for delivery next.
Once it does go "Live" in the app, you cant actually see anything else about it. You just get a message saying "Remote access is not enabled". Early on, some were enabled while on the line and en route, but I think they've since made that a step to turn it off until it's delivered.