MacRumors published a story that Apple has released the third beta of tvOS 16.1 to registered developers.

Apple Seeds Third Beta of tvOS 16.1 to Developers

Apple today seeded the third beta of an upcoming tvOS 16.1 update to developers for testing purposes, with the beta coming one week after the launch of the second beta.

tvOS updates are typically minor, focusing on under-the-hood bug fixes and improvements rather than outward-facing changes. No new features were found in the first beta of tvOS 16.1.

  Apple Seeds Third Beta of tvOS 16.1 to Developers