He gained more widespread recognition during the 2021 IIHF U20 World Juniors Championship due to his outstanding play for Team Canada, helping them win silver. He ended the tournament with a .964 SV% and a 0.75 GAA, both being the best in the tournament. After the Gold Medal game, he was named the Best Goaltender of the tournament by the IIHF Directorate and named one of the members of the Media All-Star Team. After the World Juniors, Levi revealed that he had played the entire tournament with a fractured rib after sustaining the injury against the German team.