Lost pass code
I bought my grandson a refurbished iPad for Christmas he only set up pass code and never went any further and now he has forgotten passcode
Question marked as
If the iPad has iOS 15.2 installed, see: How to reset your iPhone, iPad, or iPod touch when you forgot your passcode - Apple Support
If that option is not available, you will need to use a computer. See: If you forgot your iPad passcode - Apple Support