The iPhone 16 family of phones all use a chip called A18, which is made by TSMC. Both chips are made on a second-generation 3nm process, and appear to be the same aside from a binned version used in the non-Pro phones.

Apple's A16 chips are now being manufactured on American soil at TSMC's Arizona plant, according to Taiwan-based independent journalist

TSMC has started production in its first US fabrication unit in Arizona. It's manufacturing Apple's A16 processors.