add custom menu in woocommerce dashboard [closed]

You can use the following to create a sub menu under woocommerce.
Please use the following for reference.
https://developer.wordpress.org/reference/functions/add_submenu_page/

 add_action('admin_menu', 'testing_submenu_page');

function testing_submenu_page() {
    add_submenu_page( 'woocommerce', 'sub menu', 'sub menu', 'manage_options', 'woo-subpage-test', 'test_callback' );
}

function test_callback() {

    echo '<div class="wrap"><div id="icon-tools" class="icon32"></div>';
        echo '<h2> Sub menu test page</h2>';
    echo '</div>';

}

Example what the results will look like: