Same here. That's what I have got from Canada Post:
I do see that this item was delivered on Thursday, May 9, 2019, at 9:29:20 am. I see the parcel was for a Large Volume Receiver out for delivery, which means it was delivered to the building or the post office. When a large volume of mail is received by a company/institution, it is grouped into a mail bag or container. The mail is then either delivered by Canada Post to the company’s/institution’s mailroom, or picked up by the company/institution itself directly from a Canada Post facility. It may take a few days for the item to make its way from the mailroom to the addressee and to be opened/recorded as received. Once we pass the item over to their mail room, we are not able to scan as delivered.