How to unlock Apple ID
How can I unlock Apple ID when it has been locked for security purposes?
iPad, iOS 13
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How do you know it was locked for security purposes? Can you sign in anywhere using that ID? If this was an email you received, it may be a scam.
Apple ID is locked or disabled
If you have changed your ID or password, have you followed the steps in this article?
What to do after you change your Apple ID or password - Apple Support
If necessary, contact Apple ID Support.
Apple Support by e-mail or chat Work through the screens to get a chat option.
Or fill out and submit this form. The form is for iTunes, but it will get passed to the ID Support section.
From the article below.
Without proof of your identity via security questions and other carefully selected criteria, Apple Support can't help you reset a password or perform any other actions on your account. These policies are audited and reviewed on a regular basis.