As was mentioned, Pfizer delivers directly to the POUs that the provinces indicate. The model with the other vaccine companies is different. It is indeed brought in by a federally contracted service provider, FedEx and Innomar. The deliveries typically start for Moderna the day after. Depending on the proximity to where they arrive, it may be a couple of days for more remote locations, but generally speaking they start the day after.
On April 14th, 2021. See this statement in context.