MacRumors:
Apple today released iOS 17.6.1 and iPadOS 17.6.1, minor updates to the iOS 17 and iPadOS 17 operating system updates that came out last year.
This update includes important bug fixes and addresses an issue that prevents enabling or disabling Advanced Data Protection.
Read more:

Apple Releases iOS 17.6.1 With Advanced Data Protection Bug Fix
Apple today released iOS 17.6.1 and iPadOS 17.6.1, minor updates to the iOS 17 and iPadOS 17 operating system updates that came out last year. Apple...

Apple security releases - Apple Support
This document lists security updates and Rapid Security Responses for Apple software.