Routes without subdomain

How to set routes that work only with main domain and do not work with subdomains?

Trying this way:

PHP Code:

$routes->group('', ['subdomain' => ''], static function ($routes) {
    $routes->get('search', 'Home::page');
}

$routes->group('', ['subdomain' => 'es'], static function ($routes) {
    $routes->get('búsqueda', 'Home::page');
} 


Results are:

site/search (works, ok)
site/búsqueda (404, ok)
es.site/search (works, not ok !!!, must be 404)
es.site/búsqueda (works, ok)

Try to use https://codeigniter4.github.io/CodeIgnit...o-hostname

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