I believe DJI no longer supports the Phantom Pro therefore will never create another firmware update for the GL300F remote, it presently at 1.4.100 , certain apple devices won't connect with the APP.
Either Apple or DJI could solve this issue, but Apple says its DJI's responsibilty. My client has Applecare and after extensive tech support (Recovery, Update,etc) is going to the Apple store to see what New Ipads might still connect with DJIGO4 while using a GL300F remote, if any work he may get his swapped under warranty or paid exchange. it is 1/31/22 I'll try and post what happens. orlandodronerepair.com