tl;dr: There is cheating in chess. Talk about it, deal with it, but have a sophisticated, stringent game plan before the party starts!
Disclaimer: For nearly 20 years I worked as an IT professional. I play club-level Chess, my highest Elo was close to 2200. I dealt with cheating issues while organizing local and regional Chess tournaments online during Corona. Around 15 years ago I was engaged in developing a cheating detection system for Backgammon hosted by a big game server. I don’t claim that I played Backgammon world-class level. But at least I reached the semifinal twice in the world championship and knew a little bit about how to fiddle around with checkers and cube.