He won his first and only Liiga game of the season on 19 November 2021, away against JYP Jyväskylä, when Kokko replaced Stanislav Galimov in the Kärpät goal at 58:50.

Kokko also played with Kärpät for part of the early season, when both Joel Blomqvist and Leevi Meriläinen suffered injuries.

[6] Ten days later, Kokko returned for the rest of the season on loan to Hermes, where he played three playoff games.

Later that day, it was announced that he had transferred to the Lahti Pelicans under a comprehensive loan agreement for the rest of the season.

On 10 May 2024, the Kraken would call him up to their American Hockey League (AHL) affiliate Coachella Valley Firebirds.

[12] Kokko then represented Finland in the IIHF World Junior Championship in 2023, although he served as his team's third goaltender and did not play in a single game.