Use Font Awesome icons from your own host/server. Update the latest releases from GitHub.
Choose the major version and install the latest minor version. For example: Choose major version 6, and install the latest of 6.x.xx. 
Currently supported for version 4, 5, 6, 7.
This plugin did not use CDN (content delivery network). If you want to use CDN, please use official Font Awesome plugin instead.
You can dequeue duplicated Font Awesome handles from other plugins or themes to prevent conflict.
You can disable enqueue from this plugin in case you would like to do it manually. 
To get asset files for manually enqueue, use this code.
<pre>
if (function_exists('rdfontawesome_get_enqueue_files')) {
 $result = rdfontawesome_get_enqueue_files();
 if (isset($result['css']) && is_array($result['css'])) {
 $faVersion = ($result['faVersion'] ?? false);
 $i = 1;
 foreach ($result['css'] as $css) {
 wp_enqueue_style('myplugin_fontawesome_' . $i, $css, [], $faVersion);
 ++$i;
 }
 unset($css, $faVersion, $i);
 }
}
</pre>
To get URL base of the Font Awesome assets for use another files, use this code.
<pre>
if (function_exists('rdfontawesome_get_public_url_base')) {
 echo rdfontawesome_get_public_url_base();
}
</pre>
Tested up to PHP 8.5.
Font Awesome files are belong to https://fontawesome.com

Rundiz Font Awesome

Use Font Awesome from your host and update from GitHub.

Ciprian Popescu

This plugin allows you to display any Font Awesome 5, Font Awesome 6, Font Awesome 7 or Font Awesome kit icon as an editor block (Gutenberg) or a custom HTML block.
You can also add the icon as HTML code or, inline, by using the <code>[fa class="fas fa-fw fa-phone"]</code> shortcode.
Read more about the <a href="https://getbutterfly.com/wordpress-plugins/block-for-font-awesome/" rel="nofollow ugc">Block for Font Awesome plugin</a> here.

Block for Font Awesome

We have installed this plugin on our 400+ agency websites and couldn't be happier.

Adding icons is a breeze, and the HTML and shortcode support extends into our theme development process.

Great time-saving plugin!

Display a Font Awesome 5, Font Awesome 6, Font Awesome 7 or Font Awesome kit icon in a Gutenberg block or a custom HTML block.

Rundiz Font Awesome vs Block for Font Awesome