Pr Kenneth Regan who is the leading expert when it comes to cheating in chess did indeed do a statistical analysis of Niemann performance during the past two years [0]. He found no indication of cheating whatsoever.
[0] https://en.chessbase.com/post/is-hans-niemann-cheating-world...
He is not some Pr Kenneth Regan. He is actually a recognised expert on statistical analysis when it comes to cheating in chess and has worked for FIDE multiple times. Plus it’s not like it’s only his words. He actually published a very valid engine based analysis of Niemann performance in the last two years. Is the issue that it’s showing the opposite of what you would like it to?
Meanwhile Magnus is actually a player in the game involved and the losing one at that. He has zero claim to objectivity.