[7] In recognition of his achievements, he received the Jim Piggott Memorial Trophy as the WHL's rookie of the year.

[11] In the semi-final against Sweden, McKenna set a new Canadian record for most points at a single U18 tournament with his sixteenth, surpassing Macklin Celebrini and Tyson Jost.

[12] He scored a hat trick with an additional assist in the gold medal game as Canada secured the title with a 6–4 victory over the United States.

[13] At the 2024 Hlinka Gretzky Cup, McKenna scored the game-winning goal in a 2–1 victory over Sweden to clinch a sweep of the preliminary round.

[16] McKenna's parents both played hockey and his father constructed an outdoor rink for him to practice every winter.