Delivering a new car without the sticker still on the window is a federal offense, $1000 fine for each car they do that with.
That said- nearly 100% of Teslas I've seen for delivery around here seem to have them removed from the window already (if not missing entirely) so apparently nobody's enforcing said law.
Mine was removed (but inside the car) and it was wrong (didn't reflect FSD)- service center was later able to print a "correct" one but just on normal printer paper rather than the "real" looking one.