Upgrade my security please
Provide new security updates
iPhone 6s, iOS 15
Question marked as
Your tag line says that you have an iPhone 6s running iOS 15.
iOS 15 is as far as that iPhone can go. It cannot run iOS 16, nor iOS 17 (which is what the Related Article is about). The latest version of iOS 15 is iOS 15.8.
About iOS 15 Updates - Apple Support
If you are not yet running iOS 15.8, see
Update your iPhone or iPad - Apple Support