Hans is known to have cheated, his coach is known to have cheated, add low security in the event, Hans beating Magnus (a player two tiers above him) on black pieces (Magnus has lost only 15 games against black in an entire world champion career) and Hans acting suspicious during the game and here we are.
chess.com suggests Hans cheated more than he admits. He did (much?) better in tournaments with zero delay. In a few consecutive tournaments, he made a lot of top engine moves, slightly above Magnus/Kasparov/Fisher at their best. He had a hard time explaining his lines in the interview after the game (with Firouzja I think).
