Van Zundert attended several training seminars both abroad in Andorra, France, and the United States, as well as domestic ones sponsored by Joan Haanappel's Netherlands Figure Skating Foundation.

[6] Due to the cancellation of the Junior Grand Prix, van Zundert opened her season by making her senior international debut at the 2020 CS Nebelhorn Trophy, where she was the youngest competitor.

[1][7] After the competition, she announced she was leaving her longtime coach, Ans Bocklandt, to train under Jorik Hendrickx and Carine Herrygers in Eindhoven and Tilburg.

[8] In November, van Zundert won her first international title at the 2020 NRW Trophy, ahead of Josefin Taljegård and Jenni Saarinen.

[9] Van Zundert competed at several other Senior Bs throughout the season, winning medals at the Winter Star (silver) and Celje Open (gold).

At the World Championships, she received a short program score of 57.72, which qualified her for the free skate in twenty-fourth position, the last skater to make the cut.

[16] Shortly afterward she made her debut at the European Championships but had a disappointing outing when she failed to advance to the free skate and finished in twenty-seventh place.

Coach Carine Herrygers opined, "she has put too much pressure on herself in recent weeks" and "in that respect, it has been a good lesson for the Games.

"[17] Competing in the 2022 Winter Olympics in the short program of the women's event, Van Zundert came twenty-second, qualifying for the free skate.

With a wider margin of 13.24 points in the free program, she retained the Dutch title while ending up seventh overall in the Challenge Cup.

[14] In the aftermath of the Olympic season, Van Zundert would subsequently admit to struggling with motivation, saying "I had reached the highest level in competitions.

As a result, she opted to reduce her short program technical content going into the 2023 World Championships in Saitama, performing only a triple-double combination.

She cited a lack of energy to continue training as well as the 2024 deaths of fellow Dutch figure skaters Sjoukje Dijkstra and Joan Haanappel, with whom she had been friends.