I've signed up for an account using Apple and chose "Hide my email". How can I find out what is the registered email address?

When you choose "Hide my email" during the sign-up process, Apple will randomly generate an email address for you (E.g. randomemail@privaterelay.appleid.com). Apple links this generated email address to the email address used for your Apple ID. Find out more here. 

Tap Continue with Apple to log in if you are not logged in.

If you are logged in/After logging in:

• Tap Profile.
• Tap Settings.
• Select Edit profile.
• Scroll down and look for Email.

If you wish to change from Apple login to Email address login instead, please follow the steps here.