New iPhones normally enter a "verification" stage in their production by July of the year in which they launch. However, 1 member of the rumored 14 series is now said to be severely behind in this scheme of things due to the latest March 2022 pandemic-averting restrictions in major Chinese manufacturing centers such as Shanghai. The situation is tipped to cost Apple big in terms of 2022 revenue.
https://www.notebookcheck.net/iPhone-14-production-is-weeks-behind-schedule-thanks-to-the-resumption-of-lockdowns-in-China.622261.0.html