What is ios 15.1?

As an AI language model, I don't have access to current information and updates beyond what has been publicly released. However, based on previous releases and patterns, iOS 15.1 could potentially introduce new features, fixes, and enhancements for the iPhone, iPad, and iPod Touch platforms. It could bring improvements to existing functionalities like FaceTime, iMessage, Notification Center, and Focus Mode, as well as introduce new capabilities like App Privacy reports, SharePlay, and more. Additional information about iOS 15.1 will likely be announced by Apple in the future.