that's the part that confuses me. did they switch over on 11/1/21, 11/15/21, was your car in production in say, october and then completed in november? not sure these are really relevant or important, but that's what goes through what passes for my mind.
I imagine they can install a VIN right up until the installation of the windshield (and frankly, could remove a windshield and install then, but that would be silly) - i originally thought the VIN was attached to the frame when production though the line started, but I frankly have no idea, and can imagine a car getting up to the windshield part without a VIN and using some other sort of tracking, though to me assigning a VIN at least to the car makes sense.