ipad unavailable

There is an Apple article that explains what to do if you have forgotten an iPhone or iPad passcode. Click on the following link: If you see an iPhone or iPad unavailable message or Security Lockout screen - Apple Support

If that is not an option, you will need to use a computer. See: If you forgot your iPad passcode - Apple Support

Click here and follow the instructions. Restoring the iPad 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.

(251176)