[7] Usacheva next competed in the junior ladies category at the inaugural Denis Ten Memorial Challenge where she won both the short program and the free skate to earn her first international gold medal ahead of training mate Maiia Khromykh in second and Bulgarian competitor Maria Levushkina in third.

[9] In an interview with Sports.ru following the event, Usacheva stated that she'd begun training a triple axel and that she hoped to debut the element at the 2020 Russian Junior Figure Skating Championships in February 2020.

[6] Usacheva did not compete again until the 2020 Russian Junior Figure Skating Championships where she won the bronze medal behind training mates Kamila Valieva and Sofia Akatieva.

Usacheva executed both of her programs cleanly for the first time in competition all season, and due to her result was named to the Russian team for the 2020 World Junior Championships in March along with Valieva and training mate and fifth-place finisher Maiia Khromykh, as silver medalist Akatieva and fourth-place finisher Sofia Samodelkina were ineligible due to age.

At the 2020 World Junior Championships in Tallinn, Estonia, Usacheva placed third in the short program behind training partner Kamila Valieva and Lee Hae-in of South Korea after under-rotating the second jump in her triple flip-triple toeloop combination.

At the third stage in Sochi, she led Anna Shcherbakova after the short program and finished second in the free skate and overall after a fall from a triple flip-triple toeloop combination.

She mentioned in an interview with Channel One Russia at the event that she'd suffered a minor injury two weeks before that affected her preparation for the season, as well as her work towards attaining a triple Axel.

In the free skate, Usacheva struggled technically in the latter half of the program and fell to fourth in the segment, but her lead from the short was enough to keep her on the podium with the silver medal overall behind Trusova and ahead of South Korean competitor You Young.

[21][22] Usacheva entered her second Grand Prix, the 2021 NHK Trophy, as one of the favorites for the gold medal following Trusova's withdrawal due to injury.