Stromgren is in a weird spot where he probably should be playing in the Allsvensken (Swedish second division) but instead is playing with the SHL teams and getting limited ice time.
In some ways it's a good sign the team has seen enough to keep him around, but yeah as a fan it'd be nice if he was playing more and dominating in the league below. There are only 14 guys in the SHL that are 20 or younger that have even played in 10 games or more, and it's about one per team.
Patience with Swedish prospects developing in Sweden is key though. Backlund never actually played in the SHL and came over after just okay performances in the Allsvensken.
Washington traded Forsberg after a poor season in the Allsvensken when he was 18/19 too.
Neither of those guys even played in the SHL at the same age that Stromgren is, and you're going to be disappointed if you expect offensive production from him this year I think. Hopefully though sticking in the SHL means he is improving his all around game which is what needed work, the raw skill and size is there.
Edit: Looks like he got an assist today on a pretty nice play by him to attack the middle of the ice after winning a board battle
https://www.shl.se/play/video/189308...ive&autoplay=1
Edit Again: And he just scored a goal to go up 3-2 in the third
https://www.shl.se/play/video/189328...ive&autoplay=1