How to count all comments.

i want to count all comments of each post but whereHas relation giving less data count of comments. In database i have checked there is 18 records of each post between dates but the problem is two post_id is same that's why giving me 16 count while i want to get 18 record count.

				 $cc = \App\Models\Post::whereHas('Comments', function ($query) use ($staffs_u, $start, $end) {
                    $query->where('internal_inquiry_status_id', 9);
                    $query->where('created_by', $staffs_u->user->id);
                    $query->whereDate('created_at', '>=', $start);
                    $query->whereDate('created_at', '<=', $end);
                });
							dd($cc->count());

Post model:

              public function comments()
		    {
               return $this->hasMany(Comment::class);
                }

Comment model:

             public function Lead()
           {
               return $this->belongsTo(Post::class);
             }