[6] In the 100 metre breaststroke, she won the bronze medal and set a new British age group record with her time of 1:07.06 for the 16-year-old girls age group, finishing just 0.09 seconds behind silver medalist Kaitlyn Dobler of the United States and 0.04 seconds ahead of fourth-place finisher Anastasia Makarova of Russia.

[2] As part of the competition, held at Tollcross International Swimming Centre in December in Glasgow, Scotland, she placed 34th in the prelims heats of the 50 metre breaststroke with a time of 31.36 seconds.

[2] In January 2021, Van der Merwe was named to the England Swimming Team in advance of the 2022 Commonwealth Games.

[15] On the first day of the 2022 British Swimming Championships in early April, the selection meet for the 2022 Commonwealth Games, Van der Merwe tied for eleventh-rank in the preliminary heats of the 50 metre breaststroke with a time of 32.61 seconds, qualifying for the b-final.

[1] At the 2023 Australian Swimming Trials in Melbourne, Australia, Van der Merwe ranked sixth in the preliminaries of the 100 metre breaststroke on day two with a 1:10.03 and qualified for the evening final.