Fix

resources/views/livewire/course_list.blade.php

@@ -13,7 +13,7 @@
             <select class="form-select form-select-lg me-1" wire:model='courseId'>
                 <option value="0">Tutti
                 @foreach($courses as $c)
-                    <option value="{{$c->id}}">{{$c->name}}
+                    <option value="{{$c->id}}">{{$c->name}} - {{$c->level->name ?? ""}} - {{$c->type->name ?? ""}} - {{$c->frequency->name ?? ""}}
                 @endforeach
             </select>
         </form>