My car is in the service center right now because I configured it with 20" wheels, but since they found me an inventory car with 22" wheels, they left them on so they could give me the car sooner, without charging me for them.
I actually spent 3 months hounding them to get me my 20" wheels (the people are all super helpful, but they need more of them). I wanted them because they get up to 20% better range, give a smoother ride, and tend to handle better in adverse conditions (especially snow, which I'll need soon enough). I'll admit, the 22" look super sexy, but that's not enough for me given the downsides to keep them even for free.
Some people prefer the 22" and I definitely see why, but I definitely prefer the 20" overall.
Edit:
And yes, if they swap them, they should change the wheels shown in the car and the app. You can double check when you pick up the car and ask them to change it if they don't.