Stalker 2 has lots of different mechanics and button configurations involved, and some of them can be hard to spot at first - especially on an Xbox controller! We're seeing reports of Stalker 2 being too dark for some players, and while some of that could be to do with display settings, there is also a flashlight available in the game to brighten things up.
Stalker 2 Flashlight Xbox
You can access the Stalker 2 flashlight as soon as you get control of your character in the open world Exclusion Zone. Simply hit Right Bumper (RB) on your Xbox controller, and voila - you should be able to see much better in the dark!