Hi
It looks like it could be some form of
discolouration between the layers or the display
If it’s still in warranty it might be worth a shot taking it to apple to get it fixed under warranty however if it isn’t available you could replace the display to fix the issue
Here’s the guide for that
iPhone 14 Screen Replacement
However if it appears in a screenshot it is a software issue and could be fixed by restoring the phone or waiting for a software update that fixes it
Hopefully this helps
Any questions please ask
Thanks:-)
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iOS 16.1.1 just released. Maybe you can try updating?
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