3-level structure of parent-children

If you have a 3-level structure of parent-children, like categories in an e-shop, and you want to show the number of products on the third level, you can use with('yyy.yyy') and then add withCount() as a condition

 1class HomeController extend Controller
 2{
 3    public function index()
 4    {
 5        $categories = Category::query()
 6            ->whereNull('category_id')
 7            ->with(['subcategories.subcategories' => function($query) {
 8                $query->withCount('products');
 9            }])->get();
10    }
11}

 1class Category extends Model
 2{
 3    public function subcategories()
 4    {
 5        return $this->hasMany(Category::class);
 6    }
 7 
 8    public function products()
 9    {
10    return $this->hasMany(Product::class);
11    }
12}

 1<ul>
 2    @foreach($categories as $category)
 3        <li>
 4            {{ $category->name }}
 5            @if ($category->subcategories)
 6                <ul>
 7                @foreach($category->subcategories as $subcategory)
 8                    <li>
 9                        {{ $subcategory->name }}
10                        @if ($subcategory->subcategories)
11                            <ul>
12                                @foreach ($subcategory->subcategories as $subcategory)
13                                    <li>{{ $subcategory->name }} ({{ $subcategory->product_count }})</li>
14                                @endforeach
15                            </ul>
16                        @endif
17                    </li>
18                @endforeach
19                </ul>
20            @endif
21        </li>
22    @endforeach
23</ul>