https://support.chess.com/article/648-what-do-i-need-to-know-about-fair-play-on-chess-com
https://www.chess.com/article/view/online-chess-cheating
https://www.chess.com/article/view/chesscom-update-april-2024?alert=content#FairPlay
The site closed 58,000+ accounts last month for fair play violations and has a full team of staff working on reports along with some automated systems for detection.
https://www.chess.com/article/view/fair-play
That said, discussions of cheating, potential cheating, or cheat detection are not allowed in the general forums. If you would like to discuss join the following club. https://www.chess.com/club/cheating-forum
Feeling very depressed with the amount of cheaters I run into hovering around 2000 in blitz. Just don't know what to do anymore. I even stopped reporting them because nothing seems to come of it. They'll use the engine up till a certain point and then have trouble finishing off the game with low time. Or their play is so drastic from game to game when they stop using the engine. I fear there's nothing to be done about it. Not blaming anyone it's just super depressing.