I have no experience with a Mini 4 Pro so someone will be along shortly to advise.
I have flown in ATTI mode successfully and safely many times over the past 15 years with only one problem. It's if the drone switches between modes when flying...
On a Mini4P Atti is only a mode that it goes into when GPS signal doesn't meet minimum requirements - AFAIK it is not manually selectable using the regular controller / software.
However that should not cause you great problems flying indoors IF...
They are selling with tacit approval from DJI so call it what you want. B&H is my favorite but Adorama is doing a bang up job IMO by coming thru for Americans during trying times. Won't be forgotten. :)
I finally took delivery of the DJI RC 2 PRO CONTROLLER!
It is a Fantastic piece of equipment!
Testing begins today!
A Quick Note: If you are using it to BIND your Air 3 or Air 3S, make sure you have all the current updates for the Drones! It...