On 11 January, Fotuaika re-signed with the Titans until the end of the 2021 season, joining the club's NRL squad.[10] He began the season playing for the Tweed Heads Seagulls in the Queensland Cup.[11]
In Round 9 of the 2018 NRL season, he made his NRL debut in the Titans' 18–32 loss to the Canberra Raiders.[12] He played 16 games in his rookie season for the club, scoring two tries. On 19 September, he was selected in the Tonga 29-man squad for their Test match against Australia, but did not play.[13]
2019
On 27 August, Fotuaika extended his contract with the Titans for one season, until the end of 2022.[14] He played 21 games for the Titans before his season was cut short due to knee and wrist injuries.[15]
On 13 September, Fotuaika won the Paul Broughton Medal for Titans' Player of the Year, becoming the youngest winner of the award.[16]
2020
On 7 October, Fotuaika was named in Queensland's 27-man squad for the 2020 State of Origin series, Fotuaika would debut in Origin 2 of the series off the bench in the 34–10 loss, however Queensland would end up winning the series 2–1.[17]
2021
He played 22 games for the Gold Coast in the 2021 NRL season including the club's elimination final loss against the Sydney Roosters.[18]
2022
Fotuaika played a total of 23 games for the Gold Coast in the 2022 NRL season as the club finished 13th on the table.[19]
Fotuaika played two games for Queensland in the 2023 State of Origin series as they won the shield 2-1. He played a total of 21 matches for the Gold Coast in the 2023 NRL season as the club finished 14th on the table.[21]
2024
Fotuaika was named on the bench for Queensland ahead of game one in the 2024 State of Origin series.[22]
He played 20 games for the Gold Coast throughout the 2024 NRL season as the club finished 14th on the table.[23]