Laravel. left join inside with?

Question

Laravel

There is a tree of tags, parent tags, child. Many-to-many relationship.
I make a selection:

Tag::with(['tags' => function($query) {
            $query->orderBy('name');
        }])
        ->leftJoin('entity_tag', 'entity_tag.tag_id', '=', 'tags.id')
        ->select(\DB::raw('COUNT(entity_tag.id) as entity_count'), 'tags.*')
        ->get();

I need the number of entities to be calculated for child tags too. Is there any way to add it to the with condition?
Something like this is needed to make it happen:

Tag::with(['tags' => function($query) {
            $query->orderBy('name');
            ->leftJoin('entity_tag', 'entity_tag.tag_id', '=', 'tags.id')
            ->select(\DB::raw('COUNT(entity_tag.id) as entity_count'), 'tags.*')
        }])
        ->leftJoin('entity_tag', 'entity_tag.tag_id', '=', 'tags.id')
        ->select(\DB::raw('COUNT(entity_tag.id) as entity_count'), 'tags.*')
        ->get();