The Falcon and the Winter Soldier is exclusive to Disney+ in Canada. This is a Marvel Studios series, and Disney controls all streaming rights. It is not available on Netflix, Prime Video, or any other platform in Canada — only Disney+.
Your options:
What to expect: 6 episodes total, ~50 minutes each. The series picks up after Avengers: Endgame and focuses on Sam Wilson (Falcon) and Bucky Barnes (Winter Soldier) as they team up. Essential viewing if you care about the MCU timeline leading into Captain America: Brave New World.
Pro tip: If you are only interested in one series, the annual subscription ($119.99) is cheaper than 3 months of monthly payments ($35.97). Do the math based on what else you want to watch — Disney+ has most Marvel shows, Star Wars, Pixar, and National Geographic content.