[2][3] She competed in the women's 400 metre freestyle at the 2019 World Aquatics Championships.

[4] She also competed in the women's 4 x 200 metres freestyle relay at the 2020 Summer Olympics.

[6] The following month, she was named as one of the female swimmers representing South Africa for the 2022 Commonwealth Games.

[7] For the 100 metre butterfly, with preliminaries on day one of swimming at the 2022 Commonwealth Games in Birmingham, England, Coetzee was one of three South Africans to qualify for the semifinals, along with Erin Gallagher and Trinity Hearne.

[9] Two days later, she contributed a split time of 1:59.49 to the 4×200 metre freestyle relay, helping finish fourth in 8:02.28.