How do i display the subcategory of Post type in WordPress?

My Category Structure is like below
Category structure:

Product 1
Product 2
    Product 2.1
    Product 2.2
Product 3
Product 4
    Product 4.1
    Product 4.2

How can i get all the category & its sub category in WordPress.
My Post type name is Product & Taxonomy name is productcategory

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  1. this might help you..

    <?php
    //list terms in a given taxonomy using wp_list_categories  (also useful as a widget)
    $orderby = 'name';
    $show_count = 0; // 1 for yes, 0 for no
    $pad_counts = 0; // 1 for yes, 0 for no
    $hierarchical = 1; // 1 for yes, 0 for no
    $taxonomy = 'genre';
    $title = '';
    
    $args = array(
      'orderby' => $orderby,
      'show_count' => $show_count,
      'pad_counts' => $pad_counts,
      'hierarchical' => $hierarchical,
      'taxonomy' => $taxonomy,
      'depth'    => 2,
      'hide_empty' => 0,
      'title_li' => $title
    );
    ?>
    <ul>
    <?php
    wp_list_categories($args);
    ?>
    </ul>