MacRumors published a story that Apple has released tvOS 14.3.

Apple Releases tvOS 14.3 for Fourth and Fifth-Generation Apple TV Models

Apple today released tvOS 14.3, the fourth update to the tvOS 14 operating system that was initially released on September 16. tvOS 14.3 comes more than a month after the release of tvOS 14.2. tvOS 14.3, which is a free update, can be downloaded over the air through the Settings app on the ‌Apple TV‌ by going to System > Software Update. ‌‌‌‌Apple TV‌‌‌‌ owners who have automatic software updates enabled will be upgraded to tvOS 14.3 automatically. The update brings support for Apple Fitness+, the company's new subscription workout experience that uses the Apple Watch to track workouts, and a new Fitness app will show up on the ‌Apple TV‌ once you've updated to tvOS 14.3. 

Apple Releases tvOS 14.3 for Fourth and Fifth-Generation Apple TV Models