Right after you enable the Reviews Page module, the page can show "0 guest reviews" even though your site has many reviews. This is expected for the first few minutes.
Why this happens. The page reads from a summary that the HomeRunner Toolkit builds in the background the first time the module is turned on. Until that first build finishes, the page shows its empty state. On a site with tens of thousands of reviews, the build can take a couple of minutes.
What to do. Wait a few minutes and reload the page. The review count, average rating, and review cards appear once the build completes. You do not need to re-import anything, and no reviews are missing. If the page still shows zero after about fifteen minutes, contact support so the build status can be checked.