MacRumors published a story that Apple has released tvOS 13.4 Beta 2 to the developers.
Apple Seeds Second Beta of Upcoming tvOS 13.4 Update to Developers
Apple today seeded the second beta of an upcoming tvOS 13.4 update to developers for testing purposes, two weeks after seeding the first beta and two weeks after the release of tvOS 13.3.1. Designed for the fourth and fifth-generation Apple TV models, the new tvOS 13.4 developer beta can be downloaded onto the Apple TV via a profile that's installed using Xcode.
Apple Seeds Second Beta of Upcoming tvOS 13.4 Update to Developers