[4] Amber identifies as pansexual;[5] she is the only openly LGBTQ women's singles skater on Team USA as of December 2019[update].

[11][12] Ranked fifth in the short program and eighth in the free skate, she finished seventh at the 2014 World Junior Championships in Sofia, Bulgaria.

[16] 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.

Assigned to two Grand Prix events, she placed seventh at the 2019 Skate America and sixth at the 2019 Cup of China.

[20] 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.

[23] 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.

[24] With the pandemic restricting international travel, the ISU opted to conduct Grand Prix assignments based mainly on training location.

Glenn revealed that she had been suffering from a foot infection that had spread up to the knee and had begun a course of antibiotics on the day of the free skate.

Figure Skating opted to name bronze medalist Karen Chen, who had finished 0.35 points behind Glenn, alongside champion Bradie Tennell to the 2021 World Championships team.

[30] It was the first time since 2008, when Katrina Hacker was bypassed in favor of Kimmie Meissner, that the selected ladies team in a non-Olympic year did not follow Nationals placements (for age-eligible skaters).

Glenn withdrew from the Skating Club of Boston's Cranberry Cup event and then made her full competitive debut at the 2021 CS Finlandia Trophy, where she placed tenth.

[32] Beginning the Grand Prix at 2021 Skate America, Glenn did not attempt a triple Axel in competition after practice session difficulties.

[35] Glenn concluded the fall season at the 2021 CS Golden Spin of Zagreb, where she won the silver medal.

[16] Attempting to qualify for the American Olympic team at the 2022 U.S. Championships in January, Glenn struggled in the short program and finished fourteenth in that segment.

"[37] Glenn began the season by winning a bronze medal at the Skating Club of Boston's Cranberry Cup event before finishing fourth at the 2022 CS Lombardia Trophy.

[37] The short program in Sapporo, Japan was a struggle; she put a hand down on her jump combination and then underrotated falling on the final triple loop.

[43] Assigned to the 2023 Four Continents Championships, Glenn placed fourth in the short program, 1.76 points behind third-place Kim Chae-yeon of South Korea.

[45][46] Continuing to feel sick, she made two jump errors in the free skate and dropped to seventh overall, but she said that she was glad to have stayed in a "decent mental place.

"[47][48] Glenn competed next at the 2023 World Championships in Saitama, Japan where she finished twelfth despite under-rotating her triple axel attempt in the free skate.

After an on-ice collision with another skater in practice that set back her training by three weeks, she missed the Challenger series and other early competitions.

[53] Glenn was assigned to start the Grand Prix at Skate America, which had special significance for her as it was to be held within the Dallas–Fort Worth metroplex in Allen, close to her hometown of Plano.

[53] Glenn said it felt "very bizarre" to begin the season this late but fared well in the short program, placing second in the segment with a new personal best score of 71.45.

[58][59] She initially believed that she had missed her chance at the gold medal; however, the final skater, Isabeau Levito, fell three times, as a result of which Glenn placed second in the segment and first overall.

Glenn described her reaction as "utter shock," adding that it "was definitely not the performance I would have liked to have had tonight, and I know both Isabeau and I are capable of so much more.

[63] However, she opted to withdraw after her national title victory, citing a need to focus on the World Championships that were to take place in Montreal in March.

[64] In the short program at the World Championships, Glenn landed her first two jumping passes successfully, but fell on her triple loop and came ninth in the segment.

She placed third in the free skate, but remained in first overall due to the almost twelve-point lead she had over silver medalist, Wakaba Higuchi, in the short program.

[72] At the Grand Prix Final in December, Glenn led after the short program, where she successfully landed a triple Axel.

She was the first American woman to win the Grand Prix Final in almost fifteen years since Alissa Czisny won it in 2010.

[75] In the free skate, she landed a clean triple Axel, and though she fell on her last jump, Glenn won her second national title.