My email ID is lost

Welcome and thank you for reaching out. 🤗

According to Apple:

Check if you’re signed in on your device. Or check if you’re signed in to Apple apps or services

On your iPhone or iPad:

1. Go to Settings, tap your name, then select Sign-In & Security.
2. Find the email addresses and phone numbers that you can use to sign in.

Other ways to find your Apple Account:

• Check if you’re signed in to the App Store, FaceTime* or Messages on your Apple device. 
• Go to account.apple.com and see if the website remembers your Apple Account email address or phone number on the sign-in screen. 
• If you’re part of a Family Sharing group, you can ask a family member to check their Family Sharing settings for your Apple Account information. 

*FaceTime isn’t available in all countries or regions.

Check your inbox for emails from Apple:

Your Apple Account primary email address might be included in the body of some emails from Apple. Search your inbox for receipts as well as repair, support or billing emails from Apple.

If your primary email address is masked (j*****@icloud.com), the number of asterisks might not match the number of characters in your email address.

If you need more help, contact Apple Support directly.

Good Luck! 👋🏼😉

Smiliñ 😎 Brian | Community Volunteer

Can you give us more details?

In case this is about the forgotten Apple Account Email address you have used, try these steps:

On your iPhone, open Settings -> Your Name -> Sign in & Security -> have a look at all the registered Email and phone numbers.

Your Primary Email address is also shown beneath your name in Settings -> Your Name -> Apple Account.

If you have forgotten your Apple Account password, your can reset it by following the steps in this article, or having a look at this Apple Support video:

copied from: If you forgot your Apple Account password - Apple Support