Enable Dynamic Refresh Rate in Windows 11 (DRR) - Winaero
If you launch a game, or some media content, Windows 11 will dynamically raise the refresh rate to 120Hz. Finally, it is worth mentioning that besides the hardware support your system must have a proper graphics driver (WDDM 3.0) installed. This post will show you how to enable or disable the Dynamic Refresh Rate feature in Windows 11.
Source: winaero.com