How to show children terms even if they are empty

Ok, I think I got it! 😀
After some research in theme functions how taxonomy hierarchy structure is done I modified the code as below (don’t know if it’s coded good but it works):

/*
* Display filter taxonomies
*/
static public function taxonomy_listing( $name, $terms, $taxonomy, $selected_term, $hide_empty = false ){
    $search_more_less = adifier_get_option( 'search_more_less' );
    $counter = 0;

    foreach( $terms as $term ){
        $counter++;
        ?>
        <li class="<?php echo !empty( $search_more_less ) && $counter > $search_more_less ? esc_attr( 'term-hidden' ) : '' ?>">
            <div class="styled-radio">
                <input type="radio" name="<?php echo esc_attr( $name ) ?>" value="<?php echo esc_attr( $term->term_id ) ?>" id="<?php echo esc_attr( $name ) ?>-<?php echo esc_attr( $term->term_id ) ?>" <?php echo  $term->term_id == $selected_term ? esc_attr( 'checked="checked"' ) : '' ?>>
                <label for="<?php echo esc_attr( $name ) ?>-<?php echo esc_attr( $term->term_id ) ?>"><?php echo  $term->name ?></label>
                <?php
                    if( !empty( $term->children ) ){
                        ?>
                        <a href="https://wordpress.stackexchange.com/questions/328189/javascript:void(0);"><i class="aficon-angle-down"></i></a>
                        <?php
                    }
                ?>                  
            </div>
            <?php
            if( !empty( $term->children = adifier_get_taxonomy_hierarchy( $taxonomy, $term->term_id, $hide_empty ) ) ){
                ?>
                <ul class="list-unstyled hidden">
                    <?php self::taxonomy_listing( $name, $term->children, $taxonomy, $selected_term ); ?>
                </ul>
                <?php
            }
            ?>
        </li>
        <?php
    }