Cheating Evidence?
Niemann admitted to cheating on two occasions. Chess.com stated that it has evidence that he cheated on further occasions. It's likely that Carlsen's team has statistically analysed Niemann's online and OTB matches in a similar manner to Chess.com. Neither Chess.com nor Carlsen have been forthcoming with their evidence, but Chess.com believe that their cheat detection method is strong enough to stand in a court of law. We might never learn the evidence unless there's a legal case brought against one if the parties involved.