https://wccftech.com/download-watchos-8-5-1-macos-12-3-1-homepod-15-4-1-whats-new/

Apart from iOS 15.4.1 and iPadOS 15.4.1, Apple has also released watchOS 8.5.1, macOS 12.3.1 and HomePod software 15.4.1 for download.

If you love nothing more than brand new software updates, then today is your lucky day. Apple released iOS 15.4.1 and iPadOS 15.4.1 a while back with important fixes for both iPhone and iPad. But, apart from that, the company has seeded new watchOS 8.5.1, macOS 12.3.1 Monterey and HomePod 15.4.1 updates.