iOS 17.0 was released in September 2023, with support for the new iPhone 15 models.

iOS 17.4 was released in March 2024.

Additional updates to 17.5, 17.6 and 17.7 followed.

Any devices released after the iPhone 15 couldn't run iOS 17.

It makes me wonder how many devices exist that are still running "iOS 17.0 to 17.3.1"...