I noticed a lot of people saying things like ’ Bambu hasn’t dropped off item at XYZ shipper yet’
Maybe it’s different in other countries, here, they’d ready shipment and once a day(probably only m-f), FedEx and/or UPS would stop by to pick up a load for shipment.
There could even be a middleman contractor such as what our USPS does here, to drop loads from one sorting facility to another. These are often independent contractors.