I mean extend the way in which these extra fields are displayed. Right now you have extra fields displayed in each individual post listed on product page. Extend it so that extra fields can be compiled into a ordered/bullet list for separate display on the product page.
Let me use a mock up of your demo page, where site review urls in below screenshot are the extra field1 data values submitted by each user when they add a product review
So the ordered list of field1 values (site review urls) for product id are displayed above the actual individual post (reviews that users add).