In 2016 Spence competed at Elite Gym Massilia. She competed on uneven bars, balance beam, and floor exercise and did not qualify to any event finals. In 2017 Spence competed at Elite Canada where she only competed the uneven bars, vault and the floor exercise, due to injury during the competition. In March she competed at International Gymnix in Montreal where she won gold on the uneven bars. In May she competed at the Canadian Championships where she won silver in the all-around behind Ana Padurariu. Additionally she finished fourth on vault and third on uneven bars and balance beam. She was later selected to represent Canada at the InternationalJunior Japan competition alongside Padurariu. Spence placed eighth in the all-around. Spence ended the season competing at Elite Gym Massilia. She placed 26th in the all-around and fourth on vault.
2018
With Padurariu becoming senior, Spence entered 2018 as the top Canadian junior. In February she competed at Elite Canada where she placed first in the all-around, third on vault and first on uneven bars and floor exercise. In March Spence competed at International Gymnix where she placed sixth in the all-around, seventh on vault, sixth on uneven bars, and eighth on floor exercise. Spence was later selected to represent Canada at the 2018 Pacific Rim Gymnastics Championships. While there she helped Canada win silver in the team final. In the all-around she placed fifth, and she placed fourth on vault and sixth on balance beam and floor exercise. At the Canadian Championships in May Spence placed second in the all-around behind Zoé Allaire-Bourgie. In June Spence represented Canada at the 2018 Junior Pan American Artistic Gymnastics Championships. She placed fifth in the all-around and on balance beam and won silver in the team final. As the top 2003-born gymnast, Spence was selected to represent Canada at the 2018 Youth Olympic Games. While there she qualified to the all-around, vault, balance beam, and floor exercise finals. Spence finished 10th in the all-around final, third on vault behind Giorgia Villa of Italy and Csenge Bácskay of Hungary, fifth on floor exercise, and eighth on balance beam. She was selected as Canada's flag bearer at the closing ceremonies.
Senior
2019
In 2019, Spence turned senior. She made her debut at Elite Canada where she placed seventh in the all-around and fourth on floor exercise. In March she competed at the 2019 L'International Gymnix. She helped Canada win the silver medal. Individually Spence placed 14th in the all-around. In May Spence competed at the Canadian National Championships. After the first day of competition she was in seventh place in the all-around. On the second day, Spence withdrew from the competition after only competing on uneven bars due to a knee injury. In June Spence competed at the Flanders International Team Challenge in Ghent, Belgium alongside Laurie Denommée, Isabela Onyshko, Quinn Skrupa, and Rose-Kaying Woo. Together they placed fourth in the team final behind the Netherlands, Australia, and Belgium. Individually Spence placed sixteenth in the all-around. In September Spence competed at the Szombathely World Cup where she qualified to the vault, balance beam, and floor exercise finals. During event finals she won bronze on balance beam behind Noémi Makra of Hungary and Teja Belak of Slovenia and placed sixth on vault and fifth on floor exercise.
2020
In late January Spence was listed on a nominative roster that was released for the Melbourne World Cup, scheduled to take place on February 20. Her first competition of the season was Elite Canada, where she placed fourth in the all-around behind Ana Padurariu, Brooklyn Moors, and Isabela Onyshko. At the Melbourne World Cup Spence finished tenth in qualifications on vault and uneven bars and was the second reserve for each of those event finals; however she qualified to both the balance beam and floor exercise finals. During event finals she placed eighth on each.
