If you mean he would come inside if De Ligt magically just wasn't there, disagree. If you mean he's made his mind up knowing where De Ligt is - that's what I said. Right footed attackers do have left feet, you just need to force them to have to use them. His original position is fine, the error is Maz/Ugarte's but he chooses the wrong option in desperately lunging to block a cross/shot that never came.
Why would he, my point is because De Ligt is not fast enough he has to commit to either trying to tackle/block or nothing. I think Gakpo either just shoot (the preferable outcome for a defender) or will just breeze past him, literally a little touch with the left and buy contact/get a shot away, or just a pass, whatever he wanted. De Ligt is not close enough so he could just take a touch with his left, Maguire only reacts when he sees De Ligt is done (too late) and Ugarte is too far off. Re your follow up about scannig, no defender in world football is looking across their box, calculating the multiple runs and players availabel like some supercomputer and then deciding on their action, they might quickly look across the line but that's about it and there was a free pass (the cut back) on when you look at it that Gakpo surely saw and ignored.
@OmarUnited4ever kind of, more just his profile - big heavy unit, not dynamic but fast when up to speed coming up against someone fast and agile like Gakpo, I don't see a scenario where he can effectively defend that situation by not committing, he chose the one most people would (player fakes and you buy it) but obviously we hope PL defenders are the cut above. I think he can actually could and should have challenged the ball, obviously this seems way wiser with hindsight but as people are saying he knows Gakpo well, the danger is giving a penalty away but you know how close you are goal and if he passes you, no matter how, it's probably a goal anyway.