Yes, I have 1st hand experience on this. I went P2O Mobile to get the UAG case for M20Pro, there is some clearance at the top and bottom of the phone which does not exert pressure on the full adhesive tempered glass from Red White. I am waiting for a smaller UV full adhesive tempered glass from P2O or Red White then the M20Pro should be issue free for me.
No proper tempered glass to fit aftermarket cases is a pain in the A***. I'm still holding on to my Xs Max, if no solution for the tempered glass, gonna switch back to the Xs Max and sell the M20Pro.
I really hope that phone makers do not make all these fancy curved displays, no usefulness and give us users alot of hassle when installing tempered glass protectors and cases.