iPhone 7 won't update to iOS 16

aldred36 wrote:

Iphone 7 is no update in ios 16

This is correct, as the iPhone 7 is not compatible with iOS 16 or higher.

That model can be updated to iOS 15.7.5, no further.

For a list of equipment supporting iOS 16 and iPadOS 16, read this article --> iOS 16 and iPadOS 16 are compatible with these devices - Apple Support

Your iPhone 7 isn't on that list.

iPhone 7 cannot be updated to iOS 16. If you want to run iOS 16, you will need an iPhone 8 or higher.