In Round 1 of the 2019 NRL Women's Premiership, Aiken made her debut for the Broncos in a 14–4 win over the St George Illawarra Dragons. On 6 October 2019, she came off the bench in the Broncos' 30–6 Grand Final win over the Dragons.[5]
In October 2019, she represented Australia at the World Cup 9s tournament.[6] On 2 December 2019, she was named in the Queensland Performance Program squad in preparation for the 2020 State of Origin game.[7]
On 13 November, Aiken made her State of Origin debut for Queensland, starting at five-eighth and scoring a try in their 24–18 win over New South Wales. Following the game, she was awarded the Nellie Doherty Medal for Player of the Match.[9] On 27 November, she won the Broncos' Players' Player Award for the 2020 season.[10]
2022
In late September, Aiken was named in the Dream Team announced by the Rugby League Players Association. The team was selected by the players, who each cast one vote for each position.[11]