Recycle old iPad-
How to “ghost” an old iPad with no SIM card & don’t have passcode..want to recycle but wand data gone?
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Ordinary, you should follow this procedure to prepare an iPad for disposal:
What to do before you sell, give away, or trade in your iPhone or iPad - Apple Support
Without a working Passcode, you’ll not be able to erase the iPad from settings - but perhaps consider this…
Your iPad has an encrypted filesystem; all your locally stored data is therefore encrypted. Your iPad passcode unlocks your iPad security chip, within which the encryption keys, required to decrypt your locally stored data, is securely stored. Without the correct passcode, there are no encryption keys with which to access your stored data.
If you iPad has been disabled, the encryption keys have already been destroyed - and all locally stored data is permanently beyond reach.
If your still iPad allows entry of a passcode, repeated entry of incorrect (but different) passcodes will eventually cause the iPad to be disabled. Typically, ten failed attempt are sufficient to provoke this lockout.
When you are ready, return your old iPad to an Apple Store or an Apple Authorised Service Provider (AASP) - where the iPad will be responsibly recycled.