The 'Ken' movie you are looking for is likely the 2023 Barbie film directed by Greta Gerwig, which features Ryan Gosling as Ken. This is a theatrical release that has already completed its cinema run and is now available on streaming and digital platforms.
Renting (usually $3.99–$5.99 CAD) gives you 48 hours to watch. Purchasing ($12.99–$19.99 CAD) is permanent. For a one-time watch, rent. For rewatches or collecting, buy.
Physical media is still available through Amazon.ca and Best Buy Canada if you prefer owning a physical copy or want the special features and higher video quality.
Pro tip: Availability varies by streaming service month-to-month in Canada. If you do not see it on one service, it may be on another — or available for purchase/rental on every platform simultaneously. Check JustWatch.com/ca to see real-time availability across all Canadian streaming services in your region.