Only silver lining was that we got a decision at Old Trafford (though fwiw, it was never a goal, Onana clearly interfering with play in my view).1
He didn't touch the ball nor block thr goalies view.
Yes, am sure you're right that it conforms to the current laws.
However, in my view: since (i) Onana is the last player the ball must pass before the keeper, and (ii) the keeper has to factor in
the possibility that Onana may divert the ball, he was most certainly interfering with the keeper's perception of the situation, and therefore with play.
In any event, I felt sure they would find some reason to disallow it, so was pretty surprised it was given!