Today, Apple released iOS 15.2.1 and iPadOS 15.2 to fix some bugs that users complained about. If there is a need, you can upgrade right in the settings.
iOS 15.2.1 and iPadOS 15.2.1 Released to Fix Important Bugs
This is a small update Apple has released for iPhone and iPad users after iOS 15.2 was released about a month ago.
According to Apple's release notes, iOS 15.2.1 and iPadOS 15.2.1 have resolved several critical security flaws. It's an issue that causes Messages sent via iCloud Link to fail to load and fixes a third-party CarPlay app that doesn't respond to input. On the other hand, the new update also improves performance on older iPhones to give users a better experience.
Currently, the iOS and iPadOS 15.2.1 updates can be downloaded for free, and the software is available on all eligible devices through the Settings app. To update to new software, go to Settings -> General -> Software Update.
In addition, iOS 15.3 is also being developed and added by Apple, with new features. However, before it launches, you can update to iOS 15.2.1 first to fix security flaws.
