Apple rolled out tvOS 16.3 Beta 2 update for developers. This update is one month removed from Beta 1. and developers can use Xcode to download the update on Apple TV.
The tvOS 16.3 Beta 2 update is a small update that focuses on fixing bugs from previous versions, improving background performance, and optimizing system stability. Apple has not made public the main content of the tvOS 16.3 update, and the media has not found any new features worthy of attention in the deep dive into Beta 1.
Apple has shared some information about the tvOS release in its tvOS support documentation, which is updated after each tvOS release but does not provide details about the Beta version.