[3] In his year of NHL draft eligibility, Carlsson increased his stock in playing exclusively with the senior team in the SHL showing an offensive acumen in securing a scoring line role among Örebro HK for the 2022–23 season.

[7] On 10 October, Carlsson was named to the Ducks' opening night roster for the 2023–24 season after attending the team's training camp.

[8] However, he suffered an injury during practice on 6 October, and was unable to play in the Ducks' first two games of the season.

[9][10] Carlsson made his NHL debut on 19 October, scoring a goal in the Ducks' 3–2 loss against the Dallas Stars.

[11] On 10 November, in a 6–3 loss to the Philadelphia Flyers, Carlsson became the youngest player in Ducks franchise history to record a hat-trick, at 18 years and 319 days old.