Understanding the iPhone hardware

The iPhone is a collection of modules, chips, and electronic components from different manufacturers. Due to the complexities of the iPhone, the list of hardware components is extensive, and each device should be researched for internal components. 

For example, the iPhone 11 has an A13 Bionic processor; 64 GB, 128 GB, or 256 GB storage; 4 GB of RAM; a 6.1-inch Liquid Retina liquid-crystal display (LCD); and a dual-lens 12 MP rear camera array.

Internal images for all iPhones can be found in the teardown section of https://www.ifixit.com/Device/iPhone.