7 parts

iPhone 14 – Display – OLED
Apple

iPhone 14 Plus – Display – OLED
Apple

iPhone 14 Pro – Battery
Ampsentrix Batteries

iPhone 14 Pro – Display – LCD
Aq7 Technology

iPhone 14 Pro – Display – OLED
Apple

iPhone 14 Pro Max – Battery
Ampsentrix Batteries

iPhone 14 Pro Max – Display – LCD
Aq7 Technology