Dark mode
I can’t get the dark mode off my iPhone 12 max . Restarted it many times.
- Go to Settings, then tap Display & Brightness.
- Select Dark to turn on Dark Mode.
You can also access Dark Mode from Control Center. Open Control Center, then tap the Dark Mode button 
to turn it on or off. Learn how to use Control Center on your iPhone or iPod touch, or on your iPad.
To turn Dark Mode on automatically at sunset or at a specific time, go to Settings > Display & Brightness and select Automatic. Then tap Options to set a schedule for Dark Mode.