My Ipad states its unavailable
My son thought he was logging into his moms ipad and inadvertantly put the passcode in wrong and locked mine. it sates its unavailabe.
iPad, iPadOS 15
See this for help. You will need to use a computer for this.
If you forgot your iPad passcode - Apple Support
If you are running iOS 15.2 or later, see this.
How to remove your iPhone, iPad, or iPod touch passcode without a computer - Apple Support
