MacRumors published a story that Apple has released the fifth beta of tvOS 16.6 to registered developers.
Apple Seeds Fifth Beta of tvOS 16.6 to Developers
Apple today seeded the fifth beta of an upcoming tvOS 16.6 update to developers for testing purposes, with the beta coming two weeks after the release of the fourth beta.
Registered developers are able to download the tvOS 16.6 update by downloading a profile on the Apple TV using Xcode.