[mwt]

What time controls do you play? Cheating is much more prevalent in rapid than blitz, with correspondence probably being the worst of all. It's unlucky for people who don't like speed chess.

The only solution to this problem I'm aware of is developing/becoming a part of a community of people you trust. Of course, that's hard and comes with plenty of limitations.

Lastly, please don't get your expectations up. This is a hugely unsolved problem on lichess and the history of its and chesscom's efforts do not inspire confidence. I noticed this repo has no updates in the past three years, during which lichess has maintained its reputation of having tons of cheaters. Chesscom has a team and probably more tools (proprietary, larger company, etc.) but the best case scenario still involves cheaters getting several games in, wasting your time along the way.