[13] In September 2019, she was named in the M van der Merwe XI squad for the inaugural edition of the Women's T20 Super League in South Africa.

[16] On 23 July 2020, Kapp was named in South Africa's 24-woman squad to begin training in Pretoria, ahead of their tour to England.

[19] On 14 March 2022, in South Africa's World Cup match against England, Kapp took her first five-wicket haul in WODI cricket.

[26] She was named in the South Africa squad for the 2024 ICC Women's T20 World Cup[27] and for the ODI part of their multi-format home series against England in November 2024.

[28][29] In July 2018, she married her teammate and captain of the South African Women's cricket team Dane van Niekerk.