@mistacup When you mention “all sites”, you mean various locations/places?
The answer is no. This plugin only supports one location with an active Place ID attached. The current location will be used to source the 5 most relevant reviews and its basic information to use as Structured Data on the home page only (there is an override to the Page ID if needed).
I am quietly developing an extension to this plugin that will support multiple locations. I am still yet to decide whether to extend the Structured Data to have multiple instances as well – mainly because I don’t believe any search engine, including Google, uses the business reviews information. Also, the reviews that Google would source would only ever be its own reviews (so a little circular…).
My advice is either to disable Structured Data with this plugin, or set your preferred/primary location in the current Place and just use this.
I hope this a comprehensive response to your query.
All the best,
Noah