It’s SUPER common that guys need to break into the league on the wing, then later move back to centre. For a young guy breaking into the league, it’s a lot to adjust to the speed of the game and faster/bigger/more skilled opponents while also taking on the heavy 2-way responsibilities of a centre. Especially since at lower levels, dominant players get to mostly cheat on D, even centres, while at the NHL level this is unacceptable.
He’s only 20, and IMO has a tonne of things that will make him a great centre down the line - size, skating, puck protection, hockey IQ, high 2-way potential, etc. He has those traits that make guys like Kopitar, Matthews, Barkov, Tage Thompson, etc. so disruptive and effect as pivots. But breaking in on the wing is a good call for him, as it is for most young forwards who were centres pre-NHL.