Morning Damion
I would say yes to the software update (but a Dealer will charge £££) this should be in iDrive try My Vehicle, Vehicle Settings, Doors/Key, then scroll down to mirrors and check Fold Mirrors when Locked
If that doesn't work you need help from someone with a BMW capable diagnostic package (ISTA/INPA) to check if it is in a hidden menu. Be aware BMW are making it harder and harder to tinker with the cars mainly after 2019 year so you should be OK
Dave