Who can enter Canada proper now?
Tourism = closed. At the moment the borders for Canada are nonetheless basically closed for tourism, whatever the nation the traveler is coming from.
Important Vacationers = some exceptions. There are some exceptions for important vacationers (like spouses of Canadian residents, important staff, and many others) which are at the moment permitted to enter Canada. You can see the full list here.
Canadian Residents = sure. In fact, Canadian residents are at all times welcome to return residence at any time.