Insert script in WP head
<?php
add_action('wp_head', function() {?>
<script src="https://kit.fontawesome.com/<?php esc_html( get_field( 'fontawesome_kit_code', 'options' ) ); ?>.js" crossorigin="anonymous"></script>
<?php
});
<?php
add_action('wp_head', function() {?>
<script src="https://kit.fontawesome.com/<?php esc_html( get_field( 'fontawesome_kit_code', 'options' ) ); ?>.js" crossorigin="anonymous"></script>
<?php
});
Comments