It's not tracking.
It's Confirmation of Delivery.
And it is basically irrelevant to the buyer.
It is an important protection for the seller against fake claims of non-delivery.
With Confirmation of Delivery, the parcel is noted when the PO gets it, probably is noted when it leaves the USA, may be noted when it passes customs, and is noted when the postie has delivered it. To you. So when Delivery is Confirmed, you already know it.
Tracking gives more information, but is also seller protection.
Your item was last noted on Dec 4th. But that is not where it is. It is where it was on Dec. 4th.
Most items take from 15 -20 days for arrival in Canada from the USA.