Afaik VAR officials didnt ask the ref to review it as they thought his arms were by his side. Its another case of VAR referring the game instead of the ref.….not sure anybody knows the rules but from what I read, last nights incident wasn’t even referred to VAR.
it might be more about the club involved than the rule.
I would imagine they spent the time reviewing if the ball crossed the line (which isnt their role) and the hand ball was an after thought.