apple ID or new password won't unlock my ipad

If it is Passcode Lock, see this link...

If you forgot the passcode on your iPad, or your iPad is disabled - Apple Support

If it is Activation Lock, check this link...

How to remove Activation Lock - Apple Support

Also see link in blue letters above your name on this page.

In addition to the above ➡️ How to Unlock an iPad or iPhone? - Apple Community

All the different ways to “unlock” an iPad, and what to do if you’ve forgotten or lost or... whatever detail.