The question you have to always ask is, is that given as a foul outside the box? And I think it is
The intent is to get the ball no question, but no question looking at his and McAllister’s momentum he’s not clearing that ball with his leg/boot without making contact with McAllister which he does.
Possibly a bit harsh if it’s given, but if you look at where the ball is, McAllister either has to cushion the ball with his head to bring it down and control it with his feet. There’s just not the space and time for him to do that, and Doku can use his body to block. So then the question comes is it a necessary interception?
I’d absolutely be fuming if a penalty was given against us for it as well, but there’s no way I’d expect VAR to overturn it if the referee had given it