https://wccftech.com/macos-12-2-safari-promotion-macbook-pro/

Apple's new 2021 MacBook Pro models are great when it comes to performance as well as battery life. The company made a lot of strong improvements over the last-generation MacBook Pro models and this includes the faster 120Hz refresh rate display. In the latest macOS 12.2 beta, Apple has reportedly added support for ProMotion on the 2021 MacBook Pro models. Scroll down to read more details on the subject.

Multiple users are reporting that Apple has finally added support for ProMotion on the new MacBook Pro models with the launch of the new macOS 12.2 beta (via MacRumors). Previously, there have been several complaints regarding Safari scrolling and the lack of ProMotion support. While ProMotion is working for some apps but not Safari. With macOS 12.2, Apple will allow Safari to take advantage of the new 120Hz ProMotion display on the 2021 MacBook Pro.