How to unhide my emails

Hi, and welcome to the Apple Community,

You can manage your addresses created with Hide My Email, 

in Settings on your iPhone, iPad, or iPod touch, or on iCloud.com.

All the details about Hide My Email:

What is Hide My Email? - Apple Support

and

Create and manage Hide My Email addresses in Settings on iPhone – Apple Support

says

" Go to Settings > [your name] > iCloud > Hide My Email"

Then

"Deactivate a Hide My Email address: 

Tap an address (below Create New Address), then tap Deactivate Email Address.

After you deactivate the address, it no longer forwards emails to you"

All the best :-)