Brilliant moves are just moves that sacrifice material or allow material to be captured.
That said, discussions of cheating, potential cheating, or cheat detection are not allowed in the general forums. You could repost in the following clubbif you would like to discuss: https://www.chess.com/club/cheating-forum.
I have some reservations regarding White's performance. The game analysis reveals that White executed two 'Brilliant' moves. However, I am uncertain whether these moves were the result of White's own skill or if an engine was employed. Could someone kindly assist me in determining how to arrive at a conclusion?