You need to use a Shimano 12S chain on a 12S Shimano ring. The 12S chain works fine with 11S cassettes.
I’ve been using a 12spd xtr chainring with an 11spd xt chain and 11 spd e thirteen cassette for well over a year now, never once dropped a chain, had zero issues with shifting and had no excessive noise or wear. Recently fitted a 12 spd slx crank to a mates bike, 11spd slx cassette and chain and he reckons it’s the smoothest shifting he’s ever known so I’d have to disagree on the above