compete at her first Grand Prix event, the 2017 Cup of China, after the withdrawal of Gracie Gold. She placed tenth in China and finished the season with a second consecutive eighth-place at the 2018 U.S. Championships. 2018–19 season Glenn was sixth at the 2018 CS Lombardia Trophy and seventh at the 2019 U.S. Championships. 2019–20 season Competing on the Challenger series again at the start of the 2019–2020 season, Glenn won the bronze medal at the 2019 CS U.S. Classic. This was her first senior international medal. Assigned to two Grand Prix events, she placed seventh at the 2019 Skate America and sixth at the 2019 Cup of China. She was fourth in the short program at the 2020 U.S. Championships with a clean skate and, remarking on her then-recent coming out, said it "has brought a weight off my shoulders. It was very scary, and not having to pretend I’m someone I’m not anymore. She dropped to fifth place after the free skate and said further mental preparation was needed. Glenn finished ninth at the 2020 Four Continents Championships, her first senior ISU championship assignment. 2020–21 season The coronavirus pandemic prompted a multi-month hiatus from training, after which Glenn began working on mastering the triple Axel, which she had been attempting "for fun" periodically for nine years by that point. She missed an early virtual competition due to fracturing her orbital bone after passing out cryotherapy but then attempted the triple Axel for the first time in competition during a later virtual domestic event, singling it. With the pandemic restricting international travel, the ISU opted to conduct the Grand Prix assignments based mainly on training location. Glenn was assigned to compete at the 2020 Skate America. She placed fifth in the Skate America short program after having to execute a turn in between her triple-triple jump combination. She was sixth in the free skate, remaining in fifth place overall. Glenn attempted her triple Axel in the short program at the 2021 U.S. Championships but was unable to land it successfully. Her otherwise strong performances earned her her highest-ever placement at the event and first senior national medal, a silver. She expressed that she was "happy to finally put out a performance I'm proud of." Glenn revealed that she had been suffering from a foot infection that had spread up to the knee and had begun a course of