Add custom fields to certificate

Hello, I use LearnPress with the Certificates addon and I need to add custom fields to my certificate, such as “CPF”. They all come from the checkout custom fields (see images). How can I add them to the certificate?

I found the following code on the forum, but I can’t assign the “CPF” to the code.

/* EWS Change - Custom Shortcode */
function lporderid_function() {
    return 'test';
}
add_shortcode('lporderid', 'lporderid_function');

/* Adds new shortcode option to cert editor */
add_filter( 'certificates/fields', function($fields) {
        $fields[] = array(
               'name'  => 'shortcode',
               'icon'  => 'dashicons-smiley',
               'title' => __( 'Shortcode', 'learnpress-certificates' )
       );
        return $fields;
});

if (class_exists('LP_Certificate_Layer')) {
class LP_Certificate_Shortcode_Layer extends LP_Certificate_Layer {
        public function apply( $data ) {
               $this->options['text'] = do_shortcode('[lporderid course_id="' . $data['course_id'] . ']');
        }
}
}

Thanks for your help.