https://wccftech.com/apple-releases-tvos-13-4-for-compatible-apple-tv-models-download-now/

Apple today seeded tvOS 13.4 to the public. the release comes a week after the company released the fourth beta of the build and more than a month after the release of tvOS 13.3.1. The update is available as a free download on all Apple TV models that support the latest version. If you own an Apple TV, you can download the build right now.

The latest tvOS 13.4 builds is designed for the fourth and fifth generation of Apple TV models. There's not much to what the update has to offer because tvOS updates have always been minor in scale.  The update does focus on enhancing the overall stability of the operating system through bug fixes and performance enhancements along with security updates.