Adding Ratings to Product Page

Site URL: https://www.plantflix.com

I'm trying to add ratings to my product page using Squarespace's recommended rating-widget.com but I'm running into a couple of problems.

First off, there doesn't seem to be a way to add code to all product pages like you can for blog posts. Secondly, product pages don't allow you to add code blocks so what I'm doing is adding code into the additional info section of a product, which results in the ratings showing up at the bottom of the product page. Is there any way to customize the position of the code injection on a product page? I'd ideally like the ratings to show up directly below the title of the product.

Thanks!