Despite this, he made his international debut for Fiji at last year's World Cup and mainly spent his time with the North Sydney Bears - the Roosters feeder club.
This was until he made the switch to the 15-man code earlier this year after finding opportunities at a premium at the club.
The fullback and winger joined the NSW Waratahs ahead of the 2024 Super Rugby Pacific campaign on a two-year deal.
Speaking to League Express, Karawalevu stated that he would consider a future move to return to rugby league and play in the Super League overseas if a club came looking.
“I've spent a couple of years in rugby league, but I am incredibly excited to be back playing rugby union, the game I played throughout my whole life," he said in a statement after signing with the NSW Waratahs.
“Getting the opportunity to come to a team like the NSW Waratahs is incredible, I'd like to thank the coaches for giving me an opportunity to get back into the game I love, to train hard and hopefully I get the chance to showcase what I can do and pull on the jersey next season”.