Need for Speed Unbound - HDR Settings

This game uses the PS5 and Xbox HDR system calibration settings. Adjust the PS5 system HDR calibration or Xbox system HDR calibration.  

But in the tested version for Xbox Series after the end of the opening race, despite HDR adjustment, the actual peak brightness can remain very low, which can make the image look dim.

If the image is also too dim for you, use the tone mapping modes of your TV or switch to SDR.