Star-ratings can appear in organic search results. However, in 2019, Google changed the rules up a bit. A shop can no longer display shop-ratings (based on shop reviews) next to their own domain in the SERPs.
The reason for this decision, according to Google, is that these ratings are too “self-serving”. However, third-party review providers (like Trusted Shops) can show these star-ratings on the shop’s behalf.