E-Mail Authentication Plugin for Joomla! 4.4 / Joomla!
5.0 or never.
This plugin allows your users to authenticate themselves on your
Joomla! website with their email address (used during
registration). Instead of the username, visitors simply enter the
mail address of the account.
A note:
The plugin does not adapt the language files. This means that if
you want the login window to say "user name or e-mail address"
instead of "user name", you have to realise this via Joomla's own
language overrides.
Read more https://extensions.joomla.org/browse/new/extension/access-a-security/authentication-e-mail-by-nxd