Redirection issues

Good afternoon friends, can you help me?
In other controllers I am able to work perfectly with CI4's native redirect () method, however in this method below it does not return any error and also does not redirect to the last route.

PHP Code:

public function isAllowed()
    {
       if(!empty(Utils::getDataSession('username'))) :

        $isAllowed = false;

        $routeName = Utils::getDataMachine('REQUEST_URI');
        $getPermission = Utils::getDataSession('permission');
        
            if (in_array($routeName, $this->exception)) :
                $isAllowed = true;
            else :

                foreach ($getPermission as $key => $value) :

                    if ($value == $routeName) :
                        $isAllowed = true;
                    endif;

                endforeach;

                $permission = new Permission;

                if (!$isAllowed) :
                    return redirect()->route('dashboard');
                endif;

            endif;

        else :
            return redirect()->route('/');
        endif;
    }