Please follow step by steps to install review stars on your collection page
Log in to your Shopify store admin
Online Store > Themes > in Dawn theme, click Actions > Edit code
Find card-product.liquid file in Snippets folder
Find this line of code
{% render 'price', product: card_product, price_class: '' %}
Copy and paste Ryviu review stars below before the line of code I mentioned in step 4 above
<!-- RYVIU APP :: COLLECTION-WIDGET-TOTAL -->
<div class="ryviu-collection">
<ryviu-widget-total collection=1 product_id="{{card_product.id}}" handle="{{card_product.handle}}" reviews_data="{{card_product.metafields.ryviu.product_reviews_info | escape }}" ></ryviu-widget-total>
</div>
<!-- RYVIU APP -->Click Save button and you are done.
If you need more assistance, please feel free to contact us.