2021

Lee became age-eligible for senior competition in 2021 and made her senior debut at Elite Canada, which was held virtually due to the COVID-19 pandemic in Canada. She finished seventh in the all-around and third on floor exercise.^[9] Lee next competed at two Technical Trials.^[10][11][12] She next competed at the Canadian Championships where she finished 12th.^[13]

Lee competed at the Koper Challenge Cup in September. She won gold on balance beam and placed fourth on floor exercise.^[14] In October she competed at the World Championships. She only competed on the balance beam and finished 21st during qualifications; she did not advance to the event final.^[15]

2022

Lee competed at Elite Canada where she finished second in the all-around behind Ellie Black. Additionally she placed first on balance beam and floor exercise. She next competed at the 2022 City of Jesolo Trophy where she helped Canada finish third in the team competition. Individually she qualified to and finished seventh in the floor exercise final.^[16] In July Lee was selected to compete at the Commonwealth Games alongside Laurie Denommée, Jenna Lalonde, Emma Spence, and Maya Zonneveld.^[17] During the team final Lee helped Canada finish third behind England and Australia.^[18] She qualified to the floor exercise final where she finished fifth.

2023

Lee competed at the Pan American Championships where she helped Canada finish third as a team. In July she announced her verbal commit to compete for the Iowa Hawkeyes starting in the 2024–25 season.^[1]