how accurate the study was, I don’t know, but I saw a persuasive post claiming that Niemann performs significantly better in games with live broadcasting of the moves. I can try to find it if anyone is interested
https://en.chessbase.com/post/is-hans-niemann-cheating-world...
here's the link I was talking about https://talkchess.com/forum3/viewtopic.php?f=2&t=80630&start... at the bottom of the page in the DrCliche post
https://talkchess.com/forum3/viewtopic.php?f=2&t=80630&start...
in the post by DrCliche. I have no idea how accurate his stats are, but if they are accurate, it doesn't look good for Hansi