My iPhone 14 says unavailable how do I unlock it

First this Support Article: If you forgot your iPhone passcode or your iPhone is disabled - Apple Support

You’ll likely need to connect your iPhone to a computer and put it into Recovery Mode then restore.

But if you see a Forgot Passcode? Option in the bottom-right corner of your iPhone’s Unavailable Screen, you can proceed that easier way. This allows you to erase your iPhone directly from it, but only works in some circumstances in which this will show up. If you see a iPhone, iPad, or Apple Vision Pro unavailable message or Security Lockout screen - Apple Support

Click here and follow the instructions. Restoring the iPhone requires plugging it into a computer with iTunes or Devices installed, or a Mac running Catalina or newer.

If there's an option to erase it, you can use that instead.

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