Almost black screen at night

You have the Sleep Focus set to ON during your sleep hours at night. What you are seeing is your Sleep Focus Wallpaper. You can either disable the Sleep Focus OR change the Sleep Focus Wallpaper to avoid the black screen at nights.

Axel F.

My recommendation is try and set the Lock Screen and Wallpaper for the Sleep Focus. Also ensure that the Sleep Focus goes OFF at a certain time in the morning and then the iPhone should switch to your normal Lock Screen and Wallpaper that you had set.

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If none of the above works then Try and Force Restart your iPhone EXACTLY as shown below and see whether that resolves the issue:

• Press and quickly release Volume UP button
• Press and quickly release Volume DOWN button
• Press and Hold the SIDE button until an Apple logo appears and then release the Side button (Can take up to 20 seconds. (DO NOT release Side Button when invited to Slide Power OFF). 

Axel F.