Apple had a lot of issues on their web store in the first 30 minutes of iPhone 14 pre-order. Apple store wasn’t available until 5:07am PDT, apple advertised it to be availabel at 5am PDT.
Apple website crashed multiple times. For some apple customers, sign-in took 5 to 10 minutes. Here is a screenshot of apple website crashing.

It seems iPhones 14 are being selling faster pushing the delivery date to early to mid october in 20 minutes. Pickup options are no longer available on Sept. 16 in many stores.
