[2] He moved to Sydney at nine years of age where he was educated at Barker College, Hornsby and played junior rugby league for Glenmore Park Brumbies alongside future NRL player Joseph Sua'ali'i.

[7] In late 2022, Katoa played three matches at the 2021 Rugby League World Cup including Tonga's quarter-final loss to Samoa.

[8][9] The following year, Katoa was selected to represent Tonga in a three-Test series against England, kicking off at St Helens' Totally Wicked Stadium on 22 October 2023.

[10] Katoa was contracted to the Penrith Panthers as a junior coming through the ranks,[11] before signing with the Dolphins on the day of his 18th birthday for their inaugural 2023 NRL season.

[13] In September, the Dolphins' Inaugural Presentation Ball was held at Brisbane Convention and Exhibition Centre, and Katoa received the club's annual Rookie of the Year award.