ot_typo3/ot_admin/Configuration/Backend/Routes.php

<?php

use Opentalent\OtAdmin\Controller\SiteController;

return [
        // Create a new organization's website
        'site_create' => [
            'path' => '/site-create',
            'target' => SiteController::class . '::createSiteAction',
            'access' => 'public'
        ],        
];