They'll get marginal, inconclusive pens not given, like Martial last week, but I imagine you are right & we won't see that handball rule applied against either club, unless they grab the ball with both hands & throw it.
If you look at all the instances of penalty claims ignored by v.a.r. so far & then look at the one Salah got from the ref, for the shirt pull, it is by far the lesser 'foul' of any.
Been interesting to see if v.a.r. would have stepped in, had the ref not given it & the reaction afterwards, if it hadn't & Liverpool drew the game.