hi winpeace, we never consider review without rating during our development process.
review may don’t have pros & cons or product price (shop) but it should have at least 1 rating on it.
i actually never heard any review system that contain no rating.
but if you insist to have something like this, you can use this plugin https://uploadfiles.io/cmr8s
some strange behavior may appear, for example on block, even if its don’t have any rating, it will still print start without any rating.