https://wccftech.com/apple-seeds-tvos-14-beta-7-to-developers-download-now/

Today, Apple has seen fit to announce beta 7 of tvOS 14 to developers for testing purposes. if you're a developer, you can download the latest beta right now on your compatible Apple TV device. At this point, it's not clear what the new beta has to offer but we will get to it later.

tvOS 14 beta 7 comes a week after Apple seeded beta 6 to developers. If you're a registered developer, you can download the new beta onto your Apple TV through a profile that is installed through Xcode software on Mac.