Hi there, @cooprativa_Agencia and welcome aboard 
We already have this request on the Wishlist and I’ve added your comment there too. Many thanks for the feedback!
As a workaround, you can try using our All-in-One Reviews app where you can add multiple Google sources within a widget 
It would be nice if we can add multiple listing on a review widget. example, 1 customer with 3 different locations reviews.
Hi there, @Jose_Valladares 
Glad to say that this idea is already on the Wishlist. I’ve merged your comment with the existing request, where we’ll keep you updated.
Many thanks for the feedback and welcome to the Community 