Are you suggesting a ref away from the shot, who is watching a totally different aspect of the play, is supposed to concur with the other official?
I’m not sure which angle byujdmba saw but there was no view for me that “clearly” show his foot was in the line.
The officials are usually very good about reviewing shots like that. If they aren’t, the coaches will make sure they review it. Since it wasn’t reviewed, I assume it wasn’t as close as the video feed make it seem.
I did have the same thought though (that his foot seemed to be in the line)