[7] In the evening of day three, he swam a personal best time of 47.71 seconds in the preliminary heats of the 100 metre freestyle to qualify for the semifinals ranking first.

[6] On day one of the 2021 World Short Course Championships, held in December at Etihad Arena in Abu Dhabi, United Arab Emirates, Ceccon placed ninth in the semifinals of the 100 metre backstroke with a time of 50.22 seconds.

[11] In the same session, he split a 45.71 for the second leg of the 4×100 metre freestyle relay to help win the silver medal in an Italian record time of 3:03.61.

[17][18] At the 2022 World Aquatics Championships, held in June in Budapest, Hungary, Ceccon won a bronze medal as part of the 4×100 metre freestyle relay on the first day of pool swimming competition.

[29][30] Two months later, at the 2022 European Aquatics Championships in Rome, Ceccon qualified for the semifinals of the 50 metre butterfly ranking fifth with a time of 23.38 seconds in the morning preliminaries on day one.

[54][55][57] Commencing the 2022 FINA Swimming World Cup in Berlin, Germany on day one, the first day of his first FINA Swimming World Cup, Ceccon won the gold medal in the 100 metre individual medley with a time of 51.52 seconds, finishing 0.10 seconds ahead of silver medalist Matthew Sates of South Africa.

[59][60] On the third day, he won the silver medal in the 100 metre backstroke with his first Italian record in the short course 100 metre backstroke and a personal best time of 49.62 seconds, finishing 0.08 seconds behind 2021 World Short Course champion in the event Shaine Casas of the United States.

[67] Achieving a score of 144.8 points for the three stops of the World Cup circuit, he ranked as the seventh overall highest-scoring male competitor.

[63] Ceccon placed nineteenth in the 50 metre butterfly on day one of the 2022 World Short Course Championships, held in December in Melbourne, Australia, with a time of 22.57 seconds.

[77][78][79][80] He followed up with a 1:42.61 on the second leg of the 4×200 metre freestyle relay in the final to help achieve a new Italian record time of 6:49.63 and win the bronze medal.

[78][81][82] On the morning of day five, Ceccon swam the butterfly leg of the 4×50 metre medley relay in the preliminaries, splitting a 21.80 to contribute to a first-ranked and final-qualifying time of 1:32.31.

[90] The third day, he swam the butterfly leg of the GS Fiamme Oro 4×100 metre medley relay in 52.22 seconds, helping win the gold medal in a time of 3:34.68 with teammates Simone Stefani (backstroke), Simone Cerasuolo (breaststroke), and Alessandro Miressi (freestyle).

[92] He concluded with a national title in the 4×100 metre freestyle relay on the fifth and final day with GS Fiamme Oro teammates Alessandro Miressi, Manuel Frigo, and Marco Orsi, anchoring the relay to victory with a 47.83 that contributed to a final time of 3:14.60, which set a new Italian club record time for the event.

[93] In May, at the stop of the 2023 Mare Nostrum in Barcelona, Spain, Ceccon won the 100 metre freestyle with a time of 48.89 seconds in the final.