Both Xbox Series X|S consoles deliver next-generation capabilities powered by the Xbox Velocity Architecture, such as faster loading, the ability to seamlessly switch between multiple games with Quick Resume, richer and more dynamic worlds, and frame rates up to 120 FPS.
These will range from audio, brightness and basic visual ones. One of these settings, as well it can be found within the in-game settings is an option that reads "120 Hz Refresh Rate." This is the one you're going to want to hit, as it'll enable your console to output Vanguard at 120 FPS!