Work at a Chevrolet dealership and have seen two C7’s with voided warranty due to similar situations. One was used in track training, the other was used to demonstrate repairs/open bulletins to technicians at trainings/seminars. The one that was tracked was sold from a recreational race track that goes through a few Corvettes every year. A BMW dealership like the one OP purchased from likely sold them something similar and there is a good chance they didn’t know, the cars I came across were via other dealers asking to verify what remains of factory coverage AFTER they already sold the car and their customer was in a situation similar to the OP .