Apple is working on a new version of the Apple TV that's set to be released at some point in 2021, and the new set-top box that's coming could feature support 4K 120Hz video output.

Evidence of 120Hz support was found in the tvOS 14.5 beta code by 9to5Mac, with the code listing multiple instances of "120Hz and "supports120Hz." The code was found in PineBoard, Apple's name for the ‌Apple TV‌ interface.

read more -
Upcoming Apple TV Could Support 120Hz Refresh Rate According to tvOS 14.5 Beta Code
https://www.macrumors.com/2021/04/05/...

Function101 Remote - https://amzn.to/31VFR4M