Her first international competition was the 2018 Pan Pacific Para Swimming Championships, Cairns, where she won the silver medal in the Women’s 100m Breaststroke SB9.

[6] She also won a bronze medal in the Women's 100 m breaststroke SB9 .She also swam in two other individual events[7] At the 2022 World Para Swimming Championships, Madeira, Stephens won two medals - gold in Mixed 4 × 100 m medley relay 34 pts and silver in the Women's 100 m Breaststroke SB9.

[8] At the 2022 Commonwealth Games, Birmingham, England, she won the bronze medal in the Women's 200 m individual medley SM10.

[9] At the 2023 World Para Swimming Championships, Manchester, England, Stephens won a bronze medal in the Women's 100 m Breaststroke SB9.

At the 2024 Paris Paralympics, she won the gold medal in the Mixed 4 x 100 m medley relay 34 pts as a heat swimmer.