https://techcrunch.com/2022/09/15/apple-is-rolling-out-a-setup-fix-for-iphone-14-buyers/

Most people who are updating their existing iPhones to iOS 16.0 will be busy customizing their new lock screens and exploring all the nifty features of the new operating system. But If you have pre-ordered a new iPhone 14 or plan on buying one, you will have to update to iOS 16.0.1 straight away to avoid any setup snafus.

Apple is issuing an iPhone 14-only update to fix a bug that causes activation and migration issues. Because this update is part of setting up the new iPhone, users won’t have any trouble as long as they quickly apply the fix.