Thank you for a great suggestion, however at the moment Google reviews are not indexing with a Rich Snippets on own business website, please read below why.
According to the changes in Sep 2019, Google forbidden a LocalBusiness and Organisation schema type in the Rich Snippets for all sites except a listing/directory-sites (like Yelp or Facebook), according to this it’s not possible to use in the business plugin.
Also Google disallows using other schema types like Product, Book or Recipe for Google map reviews. Because these types should be described about a specific item, not reviews for a company, service or some business.
However, some other plugins have such a workaround, I mean use a Product schema type for a map reviews, unfortunately, Google can mark the page with this markup like a spammy rating and drop from a search. We can’t take that risk and didn’t add this workaround to our plugin.