IT House February 7 news, Apple today released the new tvOS 16.3.1 and HomePod 16.3.1 software updates, two weeks after the release of tvOS 16.3 and HomePod 16.3 updates.

According to Apple's update notes for HomePod 16.3.1, the update includes overall performance and stability improvements. Update instructions for tvOS 16.3.1 are not currently available, but may be similar to HomePod 16.3.1.
IT House understands that tvOS 16.3.1 update can be performed OTA updates through the Settings app on Apple TV, entering the system > software update. Apple TV users with automatic software updates turned on will be automatically upgraded to tvOS 16.3.1.
HomePod updates are automatically installed on HomePod, unless the feature is disabled, or you can manually update HomePod in the Home app.