Invalid argument supplied for foreach()

@Snapey Category.php Model

  public function products()
  {
   return $this->hasMany(Product::class);
   }

public function subCategories()
{
return $this->hasMany(SubCategory::class,'id_category');
 }

SubCategories.php Model public function products() { return $this->hasMany(Product::class,'id_subcategory'); } public function category() { return $this->belongsTo(Category::class); } Product.php Model

 public function category()
 {
return $this->belongsTo(Category::class);
 }

in controller:

    $categories = Category::with('subcategories.products')->get();

in view:

   <ul>
         @foreach($categories as $category)
                echo'<li value=""> {{$category->namecategory}}';
              
                  <ul>
                  @foreach($category->subCategories as $subCategory)
                     echo'<li value="">{{$subCategory->namesubcategory}}';

                                <ul>
                         @foreach($subCategory->products as $product)
                              echo'<li value="">{{$product->namesubling}}</li>';
                                 @endforeach
                               </ul>
                              </li>
                  @endforeach
                        </ul>

                     </li>
          @endforeach
             </ul>

its throwing error Invalid argument supplied for foreach() if i remove 2 foreach then its working i know that its not taking data as array so its throwing error but how i can do so i can achieve my desire view

       mobile and accessory
                mobile
                     iphone
                mobile cover
                    iphone cover 

i m try to achieve like this don't know how i do that please help me guys