[6] The 2021–22 season saw Nylén Persson record 15 goals and 47 points in 35 games, good for fifth in league scoring and first among defenders.

[7] In the 2023–24 season as the captain of Brynäs, Nylén Persson finished fifth in the league and led all defenders with 38 points in 36 games.

[8][9] Nylén Persson chose to move to North America for the 2024–25 season, declaring for the 2024 draft of the Professional Women's Hockey League (PWHL), where she was selected tenth overall by New York.

[13] Nylén Persson represented Sweden at the 2017 World U18 Championship, where they faced Russia in the bronze-medal match.

[14] Returning for the 2018 World U18 Championship, Nylén Persson was named to the media all-star team as she and Sweden claimed a silver medal.