While the product review widget only shows the reviews related to one product, you can still show all your store’s reviews on a dedicated reviews tab: Floating Reviews Widget.
This widget pops up in the form of a full-screen overlay once a visitor clicks on the Sidebar widget button or “Show more reviews” button in the Carousel widget. That means you should first activate either the Sidebar widget (learn more) or Carousel widget (learn more).
The Floating Reviews widget showcases all your store’s reviews on one tab. The reviews’ layout, colors, elements are the same as the product review widget and you can fully customize it by following this tutorial.
In addition, you can define a title name for the Floating Reviews widget and customize the color of the title’s text and background, as shown below.
Always make sure to click on the green button “Save settings” on the bottom-left corner, after changing any setting