How many routerFactorys are possible

In my RouterFactory I have:

declare(strict_types=1);

namespace App\Router;

use Nette;
use Nette\Application\Routers\RouteList;


final class RouterFactory
{
        use Nette\StaticClass;

        public static function createRouter(): RouteList
        {
                $router = new RouteList;
                $router->addRoute('/', 'Default:default');
                $router->addRoute('[<module>[/<presenter>[/<action>[/<id>]]]]', 'Default:Default:default');
                return $router;
        }
}

In another directory for my ServicesModule I have.

declare(strict_types=1);

namespace App\Router;

use Nette;
use Nette\Application\Routers\RouteList;


final class servicesRouterFactory
{
        use Nette\StaticClass;

        public static function createRouter(): RouteList
        {
                $router = new RouteList;
                $router->addRoute('/services', 'Services:Services:default');
                $router->addRoute('/services/consulting', 'Services:Default:consulting');
                $router->addRoute('/services/outsourcing', 'Services:Default:outsourcing');
                $router->addRoute('/services/teams', 'Services:Default:teams');
                return $router;
        }
}

Then in my PorfolioModule I have:

declare(strict_types=1);

namespace App\Router;

use Nette;
use Nette\Application\Routers\RouteList;


final class portfolioRouterFactory
{
        use Nette\StaticClass;

        public static function createRouter(): RouteList
        {
                $router = new RouteList;
                $router->addRoute('/portfolio', 'Portfolio:Portfolio:default');
                return $router;
        }
}

Accessing the root directory, or any of the services routes is not an issue.
However, the portfolio router seems never to be ‘picked up’, resulting in an error:

Nette\Application\BadRequestException #404
No route for HTTP request

Each of the routers is called from config file, and the router files are ‘seen’, but when I look in Tracy, the routes are listed as:

/services presenter = Services:Services
action = default

/services/consulting presenter = Services:Default
action = consulting

/services/outsourcing presenter = Services:Default
action = outsourcing

/services/teams presenter = Services:Default
action = teams

/ presenter = Default:Default
action = default

Why is the portfolio router not being added to the routes?