Apple has introduced a raft of OS updates spanning the Apple Watch to the HomePod. Also in line for an OS update is iOS, along with iPadOS and macOS. All new updates, such as macOS 12.4, can be installed now and are rolling out worldwide.
https://www.notebookcheck.net/Apple-releases-iOS-15-5-iPadOS-15-5-watchOS-8-6-macOS-12-4-and-more.620285.0.html