Hi @julie_F 
I totally agree that this feature would be really beneficial for all review sources. We’ll try to consider this opportunity in our future enhancements.
I’ve moved your comment to a separate topic. All the updates regarding G2 source will be post here.
As for the Capterra source, we already have such a request. Please vote for this feature to not miss any updates - Display responses to reviews in the widget
Many thanks for sharing your ideas with us, this is huge!