快速测试一下，两种方法似乎都很有效。

// @Rup\'s method
$terms = get_the_terms(get_the_ID(), \'my_taxonomy\');
if (!is_wp_error($terms) && !empty($terms)) {
    foreach ($terms as $term) {
      // skip if parent > 0
      if( $term->parent )
            continue;

        $name = $term->name;
        $link = add_query_arg(\'fwp_typ\', FWP()->helper->safe_value($term->slug), \'https://www.freuciv.com/\');
        echo "<a href=\'$link\'>$name</a><br />";
    }
}

$terms = get_the_terms(get_the_ID(), \'my_taxonomy\');
if (!is_wp_error($terms) && !empty($terms)) {
    foreach ($terms as $term) {
      // only do if parent is 0 (top most)
      if( $term->parent == 0 ) {
        $name = $term->name;
        $link = add_query_arg(\'fwp_typ\', FWP()->helper->safe_value($term->slug), \'https://www.freuciv.com/\');
        echo "<a href=\'$link\'>$name</a><br />";
      }
    }
}