I know its a long time ago but when the US had alcohol prohibition, Canada did not
It's different now. Canada and the U.S. have harmonized a lot of their systems. If one country bans a drug but not the other, then the other country can become a source of the illegal drug. So they usually ban things together. Mexico is the only country in North America that kind of gives the middle finger to all that, but not always.
If the U.S. bans Kratom, citing research, then Canada will likely follow. I don't see how it wouldn't. In some ways Canada is worse than the U.S. for drug regulation. At least the U.S. has a lot of OTC drugs grandfathered in before the FDA was created. Canada got rid of its grandfathering laws so they can ban almost anything, and they have been. I'm an herbalist and in the past 5 years half of my apothecary has disappeared because of Health Canada. They are closing in.
Until a revolution happens against big pharma, they are going to take over the world, and they will do so by making everyone ill while hiding the cures.