Just to set expectations... Don't count on an SDK for the mini 5P (or mini 4P, mini 3P, Air 3/3S, Mavic 3 series, Mavic 4 series, and I'm sure a few others I've missed) EVER being released.
This has been a sore point in the user community now...
This isn't automatically true. Depends a great deal on the size and traffic at the airport.
Back in the day when I was an active Private Pilot, I visited many small airports where I was the only plane to land and later take off the entire day...