I'm currently using a quickfit pro with a HANS in my F22. HMS won't approve it until they pass the seat crush test but that's not happening anytime soon.
I seriously doubt BMW has changed its seat frame construction from all of the previous series so I'm not concerned. Taking that risk is up to you however.
Otherwise HMS recommended using a harness bar like this one with the Quickfit Pro:
https://www.agencypower.com/blog/age...in-bmw-f87-m2/
You would clip it to the seatbelt buckles in the back like normal but loop it over the bar so that it takes the downward force instead of the seat in case of impact.