@AndyLuna: For Halo Infinite, you will need to enable 120hz mode via the Video tab in the game's settings menu. I'd always advise checking out the in game Video settings when you launch a game on your Series S, as some advanced features are not enabled by default (this was true of ray tracing in RE Village). Some games will also have settings that prioritise frame rate over resolution, which is typically called Performance Mode.
@AndyLuna: Please can you confirm the model number of the TV for me? If you recently purchased the TV, and you had played Halo Infinite on your previous set, try pressing the menu button on the games thumbnail while on the Xbox dashboard, select 'Quit', then relaunch the game. If you were using Quick Resume, then the game may still be running under the specs of the previous set, which may be why 120hz isn't working. Depending on the set, make sure you're connected to HDMI 4, and that 'Allow 120hz' is enabled in the Xbox Video settings. If you tap the middle button of your smart remote while the game is running, then it should reflect the refresh rate in the top right corner.
