Tested on iOS 13: I can scroll through thumbnail previews of images but tapping to view full size opens the App Store to Yelp. As for reviews, it shows 3 of them as shortened previews, so I can’t even view a single full review (unless it’s trivially short). Tapping on them again opens the App Store to the Yelp app. Around the review previews are links to “Open Yelp” and “Find out more on Yelp”, all leading to the same thing: App Store.
This is such an un-Apple-like UX. Idk if they signed a long-running contract with Yelp out of desperation when Apple Maps launched forcing it to be this way, but if not, then their insistence on this experience is truly dumbfounding.
Edit: I see you’ve tested it yourself.