In 2021, Sanchez was part of the Canadian team for the 2020 Summer Olympics in Tokyo. She won a silver medal as part of the Canadian team in the 4x100 m freestyle relay, alongside Maggie Mac Neil, Rebecca Smith, and Penny Oleksiak. She also swam the freestyle leg in the heats of the 4x100 m medley relay, helping the Canadian team finish the heats in first place, and earned a bronze medal when the finals team finished third (having been replaced in the final by Oleksiak). Sanchez competed individually in the heats of the 100 m freestyle, setting a new personal best and qualifying through to the semi-finals, but withdrew to conserve energy for the 4x200 m freestyle relay, where the Canadian team ultimately finished fourth.