$args = array(
    'labels' => $labels,
    'public'            => true,
    'show_in_nav_menus' => true,
    'show_in_rest'      => true, //添加的参数
    'hierarchical'      => true,
    'show_ui'           => true,		
    'query_var'         => true,		
    'rewrite'           => true,
    'show_admin_column' => true
);
register_taxonomy( 'topics', 'product_type', $args );