It is a method and procedure to change the administrator email address of WordPress itself.
General Settings → Administrator Email Address
WordPress itself has an email address for administrators, separate from the email addresses registered by users.
This is how to change the “administrator email address”.
Set your new email address
First, set a new email address in the administrator email address section.
Scroll to the bottom and press the Save Changes button.
You will then receive a notification of the change at the email address of your new admin email address .
[site name] email address for new administrator
An e-mail will be sent to the e-mail address for the new administrator, “[site name] new administrator’s e-mail address”.
Click the “If this is correct, click the link below to change it.” link.
Since it will be the login screen of WordPress, log in with the administrator username and password.
The admin email address has been changed!
You can change the administrator email address by following the steps above.
Please refer to it.