If warming up on a mat I’ll usually put a towel down behind the ball to make sure I’m striking it properly

Don't get too frustrated. A golf course that uses grass turf at the range faces a much higher maintenace expense as those that use mats.
I think we all would prefer to hit off real turf for warm up or practice (except those whose golf is limited to indoor similators) but if you want your couse to use turf, be prepared to pay much higher green fees.
Mats are okay to use for warm up, but your not going to get the same feedback as you would on the course. If you play the game on a regular basis you learn to recognize the difference hitting off mats in what would be a clean shot on course, or a ditch digger.
I will say from personal experience, a skull is still a skull whether it's off a mat or on course.

I’m 100% with you on this. Mats can completely mask bad contact because the club just bounces into the ball. Then you get out on real turf, take an actual divot, and suddenly the strike/location is totally different. I’ve honestly played some of my best rounds barely warming up on mats because I stop trying to “fix” my swing based on fake feedback.

Especially for players that naturally take a divot, mats can train you into getting steep or hanging back without realizing it.

Totally agree. If our range or a club I am visiting is mats only, I will just warm up with some chipping and putting. Mats lead me to bad habits and they can’t be good for the lie of my club.