Hi @bashir123,
Thank you for contacting MyThemeShop.
Sorry for the confusion, but the option to add the total rating is in the premium version of the plugin.
https://i.rankmath.com/jsj63l
You can read more about that here
https://mythemeshop.com/plugins/wordpress-review/
But if you know the PHP language, then you can use this shortcode [wp-review-total]
in your page templates to show the total rating anywhere in the theme.
I hope this helps.
Thank you.