[1] The following year, Bisset moved from Sydney to Melbourne, and Gleeson introduced her to Peter Fortune, best known as the coach of 400-metre sprinter Cathy Freeman.

[12] One week later, she ran 1:59.78 at the UniSport National Championships to become the first Australian woman in a decade to break the two-minute barrier.

[19] In the 2021 domestic season, she performed at a high level, including a second Olympic qualifier of 1:59.12 to win at the Queensland Track Classic in March.

[22] At the postponed Tokyo Olympics in July, Bisset ran 2:01.65 in the women's 800 m heats, narrowly missing her chance to advance.

[25] She secured victories in the following two top-level World Indoor Tour meets, including the Copernicus Cup in Toruń, where she defeated Halimah Nakaayi.

[28] In the first round of the World Championships held in Eugene, Oregon in July, Bisset was knocked to the track and spiked by a competitor.

[32] She then won her fourth national title in a meet record of 1:58.32, the fastest time by an Australian on home soil.

[33] At the end of her season, Track & Field News ranked Bisset seventh in the women's 800 metres, the first Australian to feature in the top-10 since Rendina in 1974.

[37] She competed in the 2024 Paris Olympics, where she drew attention among Hong Kong citizens due to sharing the same Chinese name as the singer Hacken Lee.