Fred pushed AZp from the back, which forced him to push on martial to maintain his balance. Ref looked at VAR and didnt overturn the call, goal disallowed.

Giroud’s offside was close, but, after thinking about it, hey I’ll take that based on VAR


But the foul call was totally wrong and the ref should have changed it, and VAR clearly showed Fred pushing him into martial. That actually has nothing to do with pixels or lines, just a clear foul committed by the opposing team.