Why did the stars in the rating of woocommerce products disappear?

Question

WooCommerce

After installing and setting up Woocommerce, in the product review form, the rating was in stars. After completing all the theme customization, the rating in the form became in the form of <select>. Can anyone come across how to solve this problem? As far as I understand, the rating in stars is a standard functionality, but it has disappeared.