MacRumors published a story that Apple has released the third beta of tvOS 14.2 to registered developers.
Apple Seeds Third Beta of tvOS 14.2 Update to Developers
Apple today seeded the third beta of an upcoming tvOS 14.2 update to developers for testing purposes, two weeks after seeding the second beta and a month after releasing the tvOS 14 update.
Apple Seeds Third Beta of tvOS 14.2 Update to Developers