For OZ retrieval, it's probably both of racing to the puck and winning the puck back. In the EP's earlier video, they show how Carlsson uses his body to shield the puck first from the opponent and then secures the puck. It's a very boring and subtle act, but very valuable in extending offensive possession, which EP does document.
Here's an earlier scouting review of Carlsson by EP. It's a one game review that was published 8 months ago. I timestamp the start to show an example of puck retrieval:
It's just only one game breakdown, but in that breakdown it reveals so much about Carlsson that remains true. That game was in October, before the WJC-20.