Don't think they even showed a decent replay on TV and for some reason VAR didn't look at it.
I slowed up YouTube and got this look. LAG is winning the ball and Chicharito is at the bottom in the orange boots. It looks somewhat close and I'd prob say he's 6 inches offsides. If not for the defender's trailing boot then he'd be way offside. If you look where the front of their bodies are compared to the 18, the defender is way closer.