Why iOS 16 isn’t available on my phone?

​Do you have a beta version of iOS 15.7 installed?

If so, click on the link below for instructions on how to remove a beta profile -

How to uninstall iOS or iPadOS beta software - Apple Support How to uninstall iOS or iPadOS beta software - Apple Support

Hi,

what iphone model you are talking about? if it is iPhone 11 means it is compatible with IOS 16.

To update, go to settings---General---Software update.

Check for and remove the beta profile. Restart the phone and check again for the update.