@Stephani *******
I'd say when you go back to get your loop closed (change the "under consideration" stamp to the covid extension stamp) after you're done in Section N, go back to the queue counter get a queue for section C-1, go over there and wait your turn and then ask them.
Now be advised they are not the friendliest section out there and they're pretty much no-nonsense, BUT they should be able to give you a hand out that lists the requirements to get an in country 90 day Non-B visa