Redirect 404 status #wordpress

wp_status404.php

<?php

/**
 * @link https://codex.wordpress.org/Plugin_API/Action_Reference/template_redirect
 * @link https://developer.wordpress.org/reference/classes/wp_query/set_404/
 */
function status404() {
	if ( is_singular( 'hoge' ) ) {
		global $wp_query;
		$wp_query->set_404();
		status_header( 404 );
	}
}

add_action( 'template_redirect', 'status404' );