MacRumors published a story that Apple has released the second beta of tvOS 13.4.8 to registered developers.
Apple Seeds Second Beta of tvOS 13.4.8 Update to Developers
Apple today seeded the second beta of an upcoming tvOS 13.4.8 update to developers for testing purposes, one week after seeding the first tvOS 13.4.8...
Apple Seeds Second Beta of tvOS 13.4.8 Update to Developers