That requires Always-On display (AOD)* — basically, a dynamic refresh rate capable (physical) display.
The iPhones that feature AOD are the iPhone 14 Pro, iPhone 14 Pro Max, iPhone 15 Pro, iPhone 15 Pro Max, iPhone 16 Pro, iPhone 16 Pro Max, iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, and iPhone Air.
It is not available on iPhone 13 and older/earlier models, iPhone 14, iPhone 14 Plus, iPhone 15, iPhone 15 Plus, iPhone 16, iPhone 16 Plus, or iPhone 16e.
The 2025 iPhone lineup is the first to include AOD on all models.
Always on for some, sometimes on for others
www.techradar.com
* Apple’s chosen necessity anyway as dynamic or variable refresh rate displays can consume far less power.