Has my Apple account been locked by Apple
How can I know if my account has been locked by Apple
iPad, iOS 13
You won't be able to use the ID until you unlock it. If your received an email telling you your ID was locked, it is a scam.\
Avoid phishing emails, fake ‘virus‘ alerts, phony support calls, and other scams
Identifying legitimate emails from the iTunes Store
Send the e-mail to Apple as an attachment to a new e-mail before deleting it. You can forward as an attachment by going to Mail/Message/Forward as attachment. Or control - click on the email and select Forward as attachment. You won’t receive a response.