Recovery key
What can I do if I lost my recovery key for an old ipad?
iPad
How to generate a recovery key --> https://support.apple.com/HT208072
With two-factor authentication and an Apple device, you have the option to generate a recovery key to help improve account security.
- "Creating a recovery key turns off account recovery. Using a recovery key is more secure, but it means that you’re responsible for maintaining access to your trusted devices and your recovery key. If you lose both of these items, you could be locked out of your account permanently."