According to the announcement, “You can search for things like ‘wheelchair’ if you want to know more about the accessibility of a place or ‘vegetarian’ if you’d like to know more about a restaurant’s vegetarian options. Searching pulls up all of the reviews that mention what you searched for so you can find out more information from someone who has been there.”
This new feature is available on both the iOS and Android version of Google Maps, so make sure that you have the latest update and you’ll be set. To search within reviews, users will need to launch Google Maps, search for the location that they are going to, tap the Reviews tab, and then type what you’re looking for in the search bar, after which you should be greeted with results like in the screenshot above.
Of course your mileage may vary as this depends on the reviews that have been written. If there are no reviews then you’re out of luck.