Can't be legit, because Apple ID is now Apple Account
And the message on the iPhone looks like that:
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If you see one of the following messages, your Apple Account locked automatically to protect your security and you can’t sign in and use any Apple services:
- “This Apple Account has been disabled for security reasons”
- “You can’t sign in because your account was disabled for security reasons”
- ”This Apple Account has been locked for security reasons”
This might happen if you or someone else might have entered your password or other account information incorrectly too many times. To regain access, you need to reset your password.
Learn how to reset your Apple Account password
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copied from: If your Apple Account is locked, not active, or disabled - Apple Support