Modules code example for codeigniter 4

If i don't use routes for this app/Modules/Product/Controllers/ProductController.php how can i acces this controller from url ?
If i use this route then url for this controller app/Modules/Product/Controllers/ProductController.php is sitename[.]ext/productx

Hou can i route all controller class from this path App/Modules/Controllers/ to this url sitename[.]ext/module/controller/method/params...
This is possible in codeigniter 4 ?

app/Config/Routes.php

PHP Code:

$routes->group('', ['namespace' => 'Modules\Product\Controllers'], function($routes){
    $routes->get('productx', 'ProductController::index');
}); 


app/Config/Autoload.php

PHP Code:

$psr4 = [
    'App'                 => APPPATH,
    APP_NAMESPACE         => APPPATH,
    'Config'              => APPPATH . 'Config',
    'Modules\Product'     => APPPATH . 'Modules/Product',
]; 


app/Modules/Product/Controllers/ProductController.php

PHP Code:

<?php namespace Modules\Product\Controllers;
use CodeIgniter\Controller;

class ProductController extends Controller {
    
    public function index() {
        echo "productx index";
    }
    
}