This is a common thing in Chess, What is the point you are trying to make. ?
Are you sure its not +5.44 ?
You are correct the 3rd move (Nf6+) is not correct, In fact its not legal.
An article about it :- https://en.chessbase.com/post/aphantasia-in-chess
Read more here :- https://en.chessbase.com/post/cheating-spanish-team-championship-2024