The Gamma Adjustment setting is locked, so I can’t change my brightness and the game is basically unplayable because of how bright it is. Anybody got this issue?
Ideas
It's a known issue that's currently being investigated.
F1® 25 - Community-Raised Issues (Last update: May 30) | EA Forums - 12214104
Until they release a patch to fix it the workaround is to disable HDR. I believe you can re-enable HDR after you make the changes, you just can't change it while HDR is active.