[4] After registering 50 goals and 47 assists for Flint in 2021–22, Othmann was named the OHL's First Team All-Star left wing.

[11][12] As OHL champions, the Petes qualified to the 2023 Memorial Cup in Kamloops, facing the host Blazers, the Quebec Remparts, and the Seattle Thunderbirds.

[21] Prior to the 2024-25 season, USA Today writer Vincent Z. Mercogliano rated him as the Rangers 2nd best prospect, particularly praising his shot.

[22][23] He started the season at Hartford and had 2 goals and 3 assists in his first three games before a wrist injury kept him out of the lineup through December.

[24] Despite the excellent 2021–22 season, Othmann was not included on Team Canada for the originally-scheduled 2022 World Junior Ice Hockey Championships in December 2021 through January 2022.

[28][27] Othmann said of playing on Team Canada with fellow Rangers' prospects Will Cuylle and Dylan Garand "It was a lot of fun, for sure.

"[27] On December 12, 2022, Othmann was again named to Team Canada to compete at the 2023 World Junior Ice Hockey Championships.