Google Search can show who wrote the review directly in the search results snippet. Google has this "reviewed by" rich result element next to some search results that names the author of the review.
This was spotted by Sachin Patel who posted some examples of this on X:
This somewhat reminds me of the uploaded by snippet feature.
I suspect this may be partially being pulled from review structured data but doesn't necessarily have to be pulled from there.
Forum discussion at X.
