Wix still does not have an official way of allowing Kudobuzz to display star ratings on collection pages. Due to a lot of customers requesting that feature, we found an alternative to use in the meantime till Wix is ready to make implementations that will make the star ratings show successfully.
The alternative is for the star ratings to show on the first page of your collection pages, but not subsequent pages. That means that once customers get to your site, they are still able to see star ratings on your gallery, but only for the first page.
We are still working and waiting for Wix to officially provide a solution to this and once Wix makes it available, the star ratings will show on all the collection pages.