I have already used the schema mark up but it doesn't work on my website. I also have 3 websites for which all of them have been removed. but I heard there is a plugin on woocommerce that helps to solve the problem. now for example for one of the pages I have tried this it is one of my products: خرید بوش شمع اصلی it is my category which doesn't have any stars.
but in this case:
we have stars.
by the way, I really do not know what happens that google decides on which pages to accept star snippets.