Chiles, 20, moved to World Champions Centre (WCC), the gym owned by Biles's parents, in June 2019. She won the all-around at the 2021 Winter Cup in February and came in second overall at the GK US Classic behind Biles. She also claimed the national all-around bronze medal and the national vault bronze medal. Before her move to WCC, she was the 2018 Pacific Rim Championships team, vault, and floor champion.
Chiles, who is committed to UCLA, told POPSUGAR earlier this year, "Training under Laurent [Landi] and Cecile [Canqueteau-Landi] definitely has changed my whole mindset, my whole attitude, and how I look forward to being in the gym these days. Being able to have coaches who truly understand me and what I've gone through and what I want in my career is something that I was really, really happy about."