Hi I recently had the same problem with iPhone X had every iPhone since 3G and never dropped or even scratched a screen but after making a Genius Bar appointment for the cracked camera lens they basically said it was not covered and is accidental damage and would cost £535 to repair as it’s a whole unit replacement as camera can’t be fixed on its own. So I put a complaint in and it went to a senior advisor and engineering department and they also came back with the same answer.
They failed me after years of loyal service and thousands of pounds of products purchased without a problem.
I believe your case will end up with the same result as mine as they will not listen only follow set guidelines from head office.