If reviews are showing on your products before but someday, reviews disappear. Please check the cases below to fix your issue.

Your product is disabled in your Ryviu Products Manager section:

Please enable it by clicking on product status icon so reviews will show up on your product page

Reviews disappear on one or some products, not all your products:

If you changed your product handle/permalink of product on your Shopify/ WooCommerce store after importing reviews then please go to your Ryviu dashboard > Product Manager, click on edit icon on your product to edit handle of that product to the same with the product on your store. 

If you are using an App to customize your product layout, please add our snippet codes to your app layout to make reviews showing. Here are code snippets:

Stars rating under your product title:

<div class="review-widget">
    reviews_data="{{product.metafields.ryviu.product_reviews_info  | escape  }}"
    product_id="{{product.id}}" handle="{{product.handle}}">
<!-- / RYVIU APP -->

Snippet code to display comments:

<!-- RYVIU APP :: WIDGET -->
<div class="lt-block-reviews">
   total_meta="{{ product.metafields.ryviu.r_count }}"
image_product="{{ product.featured_image.src | img_url: '800x' }}"></ryviu-widget>
<!-- / RYVIU APP -->
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