If your site shows only 5-star reviews and your reviews come from Reva, the filter is in Reva, not in HomeRunner.
Why this happens. HomeRunner imports exactly the reviews that Reva marks as published for the website, and applies no rating filter of its own. Reva’s auto-publish setting lets you publish only reviews above a certain star threshold, such as 5 stars only or 4 stars and above, while keeping the rest for internal use. Only reviews that carry the publish flag in Reva are sent to your site.
What you can do. To show all ratings, change the auto-publish setting in your Reva account to the threshold you prefer, or contact Reva support for help adjusting it.
After the change, new reviews of every qualifying rating come through to your site on the next daily review sync. Reviews that were previously held back in Reva also come through as Reva publishes them.