Courtney-Perkins was first selected for the Joeys in 2017. He was subsequently selected in the squad for the 2018 AFC U-16 Championship, where he started in the Joeys' 3-2 quarter final win over Indonesia, a win which qualified Australia for the 2019 FIFA U-17 World Cup. On 2 October 2019, Courtney-Perkins was selected in the Joeys squad for the 2019 FIFA U-17 World Cup. He started in all of the Joeys' Group B games, conceding a penalty as the Joey's fought back to secure a 2-2 draw against Hungary. He started in their Round of 16 clash with France on 7 November 2019, losing 4-0 and being eliminated from the competition.