[4] In November 2018, Schumacher won gold at the Skate Ontario Sectionals, securing a place at the 2019 Canadian Championships as a senior competitor domestically.

Sent afterward to make her international senior debut on the Challenger series, Schumacher placed eighth at the 2019 CS Warsaw Cup.

[8] A podium contender at the 2020 Canadian Championships, Schumacher placed sixth in the short program after falling on her attempted triple flip-triple toe loop combination.

[9] With national champion Emily Bausback lacking the technical minimum scores necessary to compete at the 2020 World Championships, Skate Canada deferred on making ladies' assignments for that event, and assigned Schumacher, Bausback and fourth-place Alicia Pineault to compete at the 2020 Four Continents Championships in Seoul.

[11] Schumacher finished the season at the 2020 World Junior Championships, where she placed ninth, setting new personal bests in both segments and overall.

[12] Schumacher was assigned to make her Grand Prix debut at the 2020 Skate Canada International, but the event was cancelled as a result of the coronavirus pandemic.

[18][19][20] Schumacher began the season at the 2021 CS Autumn Classic International, where she placed tenth out of eleven competitors and third of the three Canadian women competing at the event.