Unauthorized AppleID Email

In order for somebody to create an Apple Account using that email account they would have to have full access to that email account. You would therefore have bigger problems than simply the Apple account creation because it would mean that entire email account was compromised, and everything in it.

As far as the created Apple Account, there is probably nothing you can do really. I suspect you would not have all the information required (such as two factor authentication) to provide full access to the account to be able to request it be deleted --> https://support.apple.com/102559

Change the password on your email account, if you still have access to it.

"Unauthorized AppleID Email: My another gmail email was used for unauthorized AppleID account. How I can review and delete that account?"

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An eMail Address Already being Used for Apple Account:

If this has ALWAYS be your eMail Address, then I'd be a bit skeptical, as you may have already created it. So, secure both the Apple Account and the eMail Address assigned to it. For even more security, you might want to create new eMail Account(i.e. gmail or Outlook), and assign that as your primary eMail Account for your Apple Account. Go Here: Change your Apple Account Primary eMail Address - Apple Support