Ability to return all QnA items within a specific topic using flow

Using the QnA flow actions, it would be great if we could return all QnA items within a specific topic, rather than having to query QnA with a specific phrase - can we simply tell it to 'return all'?

This will allow us to output all the items in our assistant, from a specific topic, in a browse / list format; for example, when a topic has a small number of important QnA items.