UPS won’t allow shipment changes until tomorrow. It is likely due to Apple requirements, but also likely due to the fact the phones haven’t “shipped” yet.
Meaning, they are all on large pallets to cut down on shipping costs. UPS has the individual tracking numbers and has been scanning “master” tracking numbers that cover all phones on a pallet. In KY (or whatever hub they use close to you if you aren’t in the US). They’ll break these down and start to move the actual phones themselves.
At that point, their system will process changes. Apple will also flag them as “shipped”.
So, patience. Unlike normal UPS shipments these aren’t allowed to be delivered as quickly as normal. Normal shipping would have had my iPhone 15 Pro from China to me within 1-3 days. Not 7…