Webflow currently does not have a review system, nor any method to create a CMS item that is linked/referenced to another CMS collection via either forms or the Webflow API.
Your best bet is to use custom code to insert a third-party review widget.
Customer Review / Comment section
Please search the wishlist for upcoming features, and if there isn’t one for your requested feature yet, you can create a wishlist request.
You can also subscribe to wishlist items to stay updated to announcements regarding the wishlist item.