wordpress.org

By default WordPress allows unlimited login attempts through the login page but this will lock account after number of login attempts
Features
<ul>
<li>Limit the number of login attempts</li>
<li>Informs user about remaining attempts or block time on login page</li>
<li>Optional logging, optional email notification</li>
<li>Handles server behind reverse proxy</li>
<li>It is possible to whitelist IPs using a filter.</li>
</ul>
Plugin uses standard actions and filters only.

Login Restrict

For security, it will lock account after number of login attempts.

Henrik Schack

This is a plugin for WordPress that provides multifactor authentication with one-time passwords using the <a href="http://www.yubico.com/" rel="nofollow ugc">Yubikey USB token</a>. 
The plugin uses the Yubico Web service API in the authentication process. 
The one-time password requirement can be enabled on a per user basis.

yubikey-plugin

Thanks for an amazing plugin. Hopefully the maintainer is looking and will update things to show they are tested as working with WP 5.4, since it does.

Love that I can use my YubiKey on WP

Enhanced Login Security for Your Wordpress blog.

Login Restrict vs yubikey-plugin