All future Pro-branded iPhones, rather than just this year's iPhone 14 Pro and iPhone 14 Pro Max, are expected to exclusively use Apple's latest mobile chips.
Future non-Pro iPhones no longer expected to use the latest Apple chips
A16
Why only the iPhone 14 Pro models might get Apple’s upcoming A16 Bionic chipset
Apple's new A16 chip could be reserved for the iPhone 14 Pro and iPhone 14 Pro Max, with the non-Pro models predicted to retain the company's current A15 chipset.
TSMC may build A15 chips for 2021 iPhones, Macs using its next-gen 5nm+ and 4nm process
Apple is reportedly planning to manufacture next year's iPhone, iPad and Mac chips on Taiwan Semiconductor Manufacturing Company's (TSMC) 5nm+ and 4nm process technologies. By comparison, the current A14 chips in the latest iPhones and the M1 chips in the new MacBook Air, Mac mini and 13-inch MacBook Pro are being fabbed on TSMC's five-nanometer process.