gistfile1.txt

function cptui_register_my_taxes_sector() {

	/**
	 * Taxonomy: Sector.
	 */

	$labels = [
		"name" => __( "Sector", "custom-post-type-ui" ),
		"singular_name" => __( "Sector", "custom-post-type-ui" ),
	];

	$args = [
		"label" => __( "Sector", "custom-post-type-ui" ),
		"labels" => $labels,
		"public" => true,
		"publicly_queryable" => true,
		"hierarchical" => true,
		"show_ui" => true,
		"show_in_menu" => true,
		"show_in_nav_menus" => true,
		"query_var" => true,
		"rewrite" => [ 'slug' => 'sector', 'with_front' => true, ],
		"show_in_rest" => true,
		"rest_base" => "sector",
		"rest_controller_class" => "WP_REST_Terms_Controller",
		"show_in_quick_edit" => true,
		'show_admin_column' => 	true,
		];
	register_taxonomy( "sector", [ "dt_articles" ], $args );

}
add_action( 'after_setup_theme', 'cptui_register_my_taxes_sector', 999 );

function add_categories_to_cpt(){
    register_taxonomy_for_object_type('sector', 'dt_articles');
}
add_action('after_setup_theme','add_categories_to_cpt', 999);