Not a mistake and not a shop that has sold out. Apple split the lineup this year. The autumn event was Pro, Pro Max and the foldable Duo, plus watches and AirPods. The regular iPhone 18, the Air 2 and the budget 18e are expected in spring 2027 according to the coverage of the launch.
So there are effectively two launch seasons now: premium in the autumn, the phones most people actually buy in the spring.