Is this person cheating?
If you think your opponent is using disallowed resources, you should just report them.
https://support.chess.com/article/209-how-do-i-report-someone
Publicly posting games asking if cheating is occurring, or any discussion of cheating, potential cheating, or cheat detection is not allowed in the main forums.
If you would like to discuss join the following club https://www.chess.com/club/cheating-forum
However, naming still is not allowed there and if you post a game, you should remove identifying information from the embed.