Not relevant, that what VAR is there for. No complications with regards to "did he get a touch.....etc", as he painfully obviously made no attempt, whatsoever, to get anywhere near the ball, "was there any contact with KDB ?, and if so, was it sufficient to cause him to go to ground? " Hmmmmmmm! Both arms, and one almighty shove, causing him to go in the totally opposite direction to that which he intended, ie pushed away from the ball.
Sorry, no confusion, no debate, foul, penalty. The only real debate should have been, "did the referee see it clearly, give it, and VAR confirm it, or did the referee fail to give it, for ANY reason, in which case VAR, either tells him he's missed it, he's wrong, or he needs to check on monitor," either way - PENALTY.
Unless of course KDB was diving, like he does every week, like all City players!