For a guy who is quite a toolsy player I’m surprised he’s never really produced at any professional level yet.
That's just an Euro defenseman thing, as in order to make it to the pro level, their main focus is strictly on learning the defensive side of the game. If they have an offensive flair in their game, the points will come eventually. Even Dahlin, who's hyped as a world-class all-around defenseman, "only" has 20 points in 41 games in SHL, which is not THAT much for someone with incredible offensive tools.
Look at Lindholm's development, for example. He went from 4 points in 20 games in Sweden's tier 2 men's league, then 11 points in 44 AHL games, to ultimately having a 30-point rookie season in the NHL, all within the span of 2-3 years. Of course, he improved as a player during that span, but there's absolutely nothing that explains how his point totals suddenly exploded at the NHL level.