I have yet to receive approval to fly above the facility map max grid altitude.
I work for a university and our campus is about 3 miles from a small airport but our max grid has us set for 0ft. I've tried to request 3 days, a week, and two weeks out to fly at 150ft but all 3 have been denied. The frustrating part is that we've had a airspace authorization since February that has allowed us to fly 150ft with no problem.
I called my local airport just to see who is approving the request and they had no idea what LAANC is.