I know at least one that's maybe diverse is a powwow. It's a cultural gathering. That's a first step, at least, to go in that direction.
Every culture is different across Canada, formerly called Kanata. I wouldn't want to generalize this to all nations. I don't want to upset a lot of elders across the nation here. I would suggest maybe finding a consensus with each of the units or the reserve units, and then with the surrounding indigenous communities that reside on the territory, to see what they would like to incorporate.