The delivery service and companies used varies by location, and within region
also across larger expanse, such as in the EU; or across a country or continent.
FedEx and UPS are main players in some western US areas. DHL had some
forwarding business, in areas where larger ones didn't go. 'Freight forward'
services under contract, may use option; or be shipped by space available.
..Smaller regional carriers may fill in; as they do for remote 'air mail' routes..
Tracking services, where they exist, should be able to show progress in route.
[I've had both FedEx and UPS set new Apple computers out in snow and -30°F.
in semi-remote Alaska. Unaccountable 'contract drivers' had company vehicles.]
Most newer Mac products would be considered 'built to order' since they have
integrated system-on-chip shared memory and storage capacities. So if these
are not in-stock at some authorized Apple reseller, they'd be shipped direct by
Apple from their regional warehouse. ~ Or direct from a point-of-assembly.
A detailed invoice may show the route new products take, from China, etc.
Because most who may reply here are not Apple representatives nor employees
we're kind of like you. We use our own Apple products, volunteer time & pay our
own utility bills; and are geographically diverse by location and language.