Drafted from West Adelaide in the 2019 draft,[1] Biddell was a key forward in her youth. She was moved from the forward line into defence in 2022 and became a part of Adelaide's premiership-winning backline that year. The following season, Biddell earned her first All-Australian selection.
Biddell played her 50th game in the round two win against Fremantle in 2024.[3] Following a third consecutive preliminary-final exit for Adelaide, Biddell was named in her third All-Australian team alongside three teammates.[4]