if the iPad is merely disabled, it may be possible to restore it:
https://support.apple.com/en-gb/HT204306
However, if the iPad is Activation Locked - only the owner of the AppleID previously activate the iPad can remove the lock; the Activation Lock cannot be defeated or bypassed.
https://support.apple.com/en-us/HT201365
Whether stolen or not, if Activation Lock iPad is active, the iPad will be of no use to you or anyone else. Nobody here will have the means to help you - and Apple will not assist in such circumstance.
If unrecoverable, please recycle the iPad responsibly - by returning it to an Apple Store when they eventually reopen.