Many tracking numbers are actually Confirmation of Delivery numbers which are noted when the parcel is received by the post office, and not noted again until they have been delivered.
Which is all that Paypal cares about.
There may be a note when the item arrives in Canada and is accepted by Canada Post. Or not.
But mark Day 29 from purchase on your calendar as suggested and don't worry until then.
The seller must deliver by Day 45 or refund.
If your item has not been delivered by Day 42, start an Item Not Received Dispute and get your entire payment refunded.