Just as there is "generatePasswordResetLink" to obtain the link to reset the password, I need a method to obtain the link to recover the email, after an email change.

The same link that is sent in the email when an email change is made using "updateEmail" from the front.

Since without that, there is no way to use Firebase to reverse an email change through a link in a custom email, and I would have to build a complete flow on my website for this.