Load Dynamic Model

Hello 

I would like use a dynamic model, i want use loop to load multiple model dynamically, in CI3 work fine and in CI4 doesn't  work 
this is an example 

$array = array("Roles");
foreach ($array  as $key => $value) {
                
                $UsersModel = new RolesModel();  // this work fine 
                $module = $key.'Model';
                $module = new $module(); // this return error : Class 'RolesModel' not found
                        
}

can you help me !