[4] Chiu returned to international competition with the resumption of the Junior Grand Prix, competing at the second installment of the French JGP in Courchevel.

[5] Chiu won the short program by a wide margin but struggled in the free skate, remaining narrowly in first overall and taking the gold medal.

"[8] Chiu's gold medal qualified him for the 2021–22 Junior Grand Prix Final, intended to be held in Osaka, but it was cancelled due to restrictions prompted by the Omicron variant.

He set a new personal best and won that segment of the competition, finishing fourth overall, ten points behind bronze medallist Petr Gumennik.

[13][14] Chiu was assigned to finish his season at the 2022 World Junior Championships, held in mid-April rather than the traditional early March to accommodate a last-minute move from Sofia to Tallinn.

[16] In the short program, Chiu skated cleanly but for an edge call on his triple flip, receiving a new personal best score of 81.59.

[19] He then made his senior Grand Prix debut at the 2022 Skate America, alongside American training partner Liam Kapeikis.

[24] At the World Junior Championships on home ice in Calgary, Chiu had a bad land on the first part of his planned jump combination, but was still able to complete it.

He finished second in the segment for the second consecutive year, coming five points behind Japan's Kao Miura and taking another silver small medal.

[27] In his second season on the Grand Prix, Chiu finished seventh at the 2023 Skate Canada International, the highest placement of the three Canadian men in attendance.

Despite problems in the free skate where he failed to land a clean quad or triple Axel, he remained in first place overall and won his first national title.

Chiu called the experience of his first senior ISU championship ""something you can't truly replicate in training," saying it was "truly eye-opening to skate alongside such incredible athletes.

Despite errors, he said he felt he had learned a lot from the experience, explaining that "skating at home, in a sold-out arena isn't something you can really replicate in training.

[2] Although Chiu had also been assigned to compete at the 2024 Cup of China, he suffered a bad fall in practice the day before the men's short program, where he injured his ankle.