I am using the RC Pro 2 controller with my Mini 4 Pro. It is an awesome combination! I haven't tried it with Maps Made Easy yet, but I did try it with DroneLInk. They don't support that combo yet, but I have it close to working. I'd be interested...
I apologize for my confusing response earlier today. (Sent before 5:00am local time today).
Should have stated: "If you have a Mavic 2 Pro like me, DJI's smart controller works perfectly with the M2P." (Never should have said "Classic 3s")
A classifieds ads lurker seems to have hijacked a listing for a used Mavic 2 Pro. He has been obtrusively insistent with phone calls, emails and texts. He only wants Zelle payment.
He appears to have taken screenshots of the original Mavic 2 Pro...