To that OP, I was referring to their concept of perhaps one being in store for some period of time instead of the brand new iPhone 15 they referenced, which was obviously just shipped and thus could be delivered up to date.
If you bought that 13 mini in an Apple store, and it had been there for a while, it would NOT be up to date. If you ordered it for delivery, those could be updated ahead of boxing and arriving as you expected it. Or if you ordered for pickup at store, the same: it could be updated pre-boxing and then rushed to the store for you. My comment was about one just sitting on shelf/inventory in store. Whatever OS is on board is the one that will come out of the box when it is purchased unless THIS concept is in play so they could update them in box in stores.