She made her elite debut at the American Classic where she finished ninth in the all-around and placed third on the uneven bars.

She returned to competition at the 2021 Winter Cup, and she finished fifth in the all-around and won the silver medal on the uneven bars behind Levi Jung-Ruivivar.

[12] She did not compete floor exercise at the U.S. Classic, and she finished 17th on vault, 11th on uneven bars, and 10th on balance beam.

She made her senior debut at the Winter Cup and finished fifth in the all-around and won the gold on uneven bars.

She won the bronze medal in the uneven bars final behind Giorgia Villa and Romi Brown.

[18] Matthews won the all-around bronze medal at the Winter Cup behind Lexi Zeiss and Ashlee Sullivan.

[20] In April, she was named to the team to compete at the Pan American Championships alongside Miller, Roberson, Tiana Sumanasekera, Addison Fatta, and traveling replacement athlete Madray Johnson.