Apple has today released iOS 15.0.2 for iPod touch and iPhone, as well as iPadOS 15.0.2 for iPads. This release addresses some bugs that have cropped in in the initial iOS 15 and iOS 15.0.1 updates, such as some photos saved to your library from the Messages app could get deleted, after removing that thread.
Other things fixed are that the new iPhone Leather Wallet with MagSafe could not work with Find My, this has now been addressed. As well as the ability to restore an iPhone 13 using iTunes or the Finder app on a Mac.
The update can be downloaded by going to Settings > General > Software Update.