How do I unlock settings on my iPhone?

Is your phone being managed using MDM software for a work or school environment to restrict what you can do?

There is no lock for a personal device on the Settings app. Do you have a screenshot of what you are seeing?

First force restart your iPhone. This may take a couple of attempts to get the speed and sequence of the key presses correct and the last step of holding the side button until the Apple logo appears could take up to 15 seconds. Ignore anything else you see on the screen during that time.

Force restart iPhone - Apple Support

Then if possible, post a screenshot of what you are seeing.

I keep trying to activate my Face ID but when I get to the picture frame

no matter how I turn my head Nothing happens. Only let’s me cancel.