The Canada/USA border is closed, other than essential trade and immediate family reunification. But, Americans are allowed to enter Canada is they are going to Alaska. It's a loop hole, some Americans are taking (unless they've gotten turned away at the border). At the border they are informed that they must to travel directly to Alaska.
Americans are starting to get fines here as well. Driving to Port Edwards, at the tip of Vancouver Island, isn't on the way to Alaska.