How do I use different email addresses on my iPhone?

Learn how to use different email addresses on your account. Step 1: Check if you can change it. On your iPhone or iPad, open the Gmail app . In the top right, tap your profile picture or initial Manage your Google Account. If you don’t use Gmail, go to myaccount.google.com. At the top, tap Personal info. Under “Contact info,” tap Email.
For More Information Please Refer:
https://support.google.com/accounts/answer/19870?co=GENIE.Platform%3DiOS&hl=en
You May Also Like to Read:
Can I use Gmail without an email address?