Copiak began gymnastics when she was three years old.[1]
Copiak placed 12th in the all-around at the 2014 International Gymnix.[3] She then competed with the team that placed fourth at the 2014 Pan American Championships.[1] At the 2014 Pan American Sports Festival, she won a silver medal on the balance beam, behind Ayelén Tarabini.[4] She then won a bronze medal on the uneven bars and a silver medal on the balance beam at the 2014 Toyota International.[5]
Copiak finished fourth in the all-around at both the 2015 Elite Canada and the 2015 Canadian Championships.[1] She also placed fourth in the all-around at the 2015 International Gymnix and won a bronze medal on the balance beam.[6] She was then selected to represent Canada at the 2015 Pan American Games alongside Ellie Black, Maegan Chant, Isabela Onyshko, and Victoria-Kayen Woo.[7] She helped the team win a silver medal behind the United States.[8] Individually, she qualified for the uneven bars final and finished seventh.[9] She was the alternate for the 2015 World Championships team.[10]
Copiak competed at the 2016 Glasgow World Cup and finished sixth in the all-around.[11] She then helped the Canadian team win the silver medal at the 2016 Pacific Rim Championships, behind the United States.[12] She was selected to be an alternate for the 2016 Olympic team.[13]
Copiak began competing for the Washington Huskies during the 2017 season. She helped Washington finish a second-best-ever eighth place at the 2017 NCAA Championships, where she became an All-American on the uneven bars.[14] She also competed at the 2018 NCAA Championships, where Washington placed 11th.[15] She scored a 9.975 on the uneven bars during a 2019 meet at UC Davis, which was the highest uneven bars score for a Washington gymnast since 2004.[16] The 2020 season was cut short due to the COVID-19 pandemic, which prompted the NCAA and Pac-12 to cancel all regular season and championship events, effectively ending Copiak's gymnastics career.[17][18] Still, Copiak was named to the All-Pac-12 Uneven Bars First Team,[19] and she also recieved All-America honors on the uneven bars.[20]