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.

yukyhendiawan

Block: Icons Font Awesome adds a single, focused Icon block to the WordPress block editor (Gutenberg). Pick from roughly 2,000 free Font Awesome 6 icons and drop them anywhere — no shortcodes, no page builder, no coding.
Icons render as inline SVG, so your site never loads the Font Awesome webfont or an extra stylesheet just to show an icon. That keeps pages fast and the markup clean.
<h4>Features</h4>
<ul>
<li>~2,000 free Font Awesome 6 icons — Solid, Regular, and Brands.</li>
<li>Full-screen icon picker with instant search (by name and keyword), a category sidebar with per-style counts, a style filter, and a “recently used” list.</li>
<li>Inline SVG output — no webfont, no render-blocking icon CSS.</li>
<li>Styling controls — color, hover color, size, and alignment.</li>
<li>Link support — wrap the icon in a link, optionally opening in a new tab.</li>
<li>Accessibility — mark an icon as decorative (hidden from screen readers) or give it a label; links always get an accessible name.</li>
<li>Global defaults — a Settings page to set the default style, size, and color, and to choose which icon styles appear in the picker.</li>
</ul>

Block: Icons Font Awesome

Add and customize Font Awesome icons in the block editor — a lightweight Icon block that renders crisp inline SVG.

Rundiz Font Awesome vs Block: Icons Font Awesome