He then played for the Philippines under-23 team at the 2022 AFC U-23 Asian Cup qualifiers. He made his debut on 25 October 2021, coming on as a 33rd minute substitute in their 3–0 loss to South Korea U23. Kekkonen was included in the 20-man squad for 31st Southeast Asian Games, which was held in Vietnam. Kekkonen scored his first goal for Philippines U23 in a 4–0 win against Timor-Leste.
