sign out restrictio

If an app or feature on your device is not working, not appearing, or is restricted (grayed out), it may have been disabled using Screen Time, or by an IT administrator if you are using a device owned by an employer or educational institution.

- Read this support article If your Apple ID or other options are greyed out in Settings —> If your Apple ID is greyed out in Settings - Apple Support

Tap Settings > Screen Time > Content & Privacy > scroll to Allow Changes and turn on.

- If the device is managed (Settings > General > VPN & Device Management), contact the IT department that is doing the managing.

You would need to turn off screen time restrictions:

Use Screen Time on your iPhone, iPad, or iPod touch - Apple Support

Use parental controls on your child's iPhone, iPad, and iPod touch - Apple Support

You might need to follow:

If you forgot your Screen Time passcode - Apple Support

IF you are just going to reset the phone for someone else to use it(or yourself) you can also follow these steps, but make dubbley sure you know your Apple ID(email) and Apple ID password first as your phone will still be locked to your apple ID when reset(but this can be removed with the password)

If you forgot your iPhone passcode - Apple Support

Note that if you restore a backup this will bring the restrictions back.

Good luck!