Code snippet for https://victorfont.com/deactivate-atomic-blocks-font-awesome/

deactivate-ab-font-awesome.php

<?php

/* Font Awesome Pro 5
 * if using Atomic Blocks and not in the editor
 * remove the plugin's Font Awesome Free styles 
 */
 
if ( wp_style_is( 'atomic-blocks-fontawesome' ) ) {
	wp_dequeue_style( 'atomic-blocks-fontawesome' );
	wp_deregister_style( 'atomic-blocks-fontawesome' );
}