You will need to use a Prestashop product Friendly URL to import reviews so please get it to refer to this instruction below
Login to your Prestashop store.
In your Prestashop dashboard, go to Catalog > Products, then you will see a list of products on your Prestashop store.
After that, choose the product you want to add reviews, select SEO, the text in the Friendly URL is the Product URL you are looking for.
All the best,