Rear differential grinding

I started getting a grinding noise from the rear of my Outer Banks yesterday. It is a 2021 with 21000 miles I bought new a year ago. Only makes noise during times the rear differential would be activated, such as using Sport Mode, or fast take-offs. Also noticed it coordinates with the Intelligent AWD info display. Not sure if I will be causing more damage by driving it. The big problem is that, at least at the dealer it was bought from, I cannot get an appointment in the next two weeks. Has anyone else had a similar issue? I don't want to damage anything further.