Is there a hidden email attached to my phone

Depending on what you are referring to these articles may help

• Check what hide my emails accounts are linked to your Apple ID Create and manage Hide My Email addresses in Settings on iPhone - Apple Support
• What is Hide My Email? - Apple Support
• Manage and use your Apple ID - Apple Support
• If you think your Apple ID has been compromised - Apple Support

Hope this helps

thats not a thing. Go to settings > email > accounts to see all connected accounts