I'm not sure what youi mean by "under Author" but if you mean you have, for example, 3 topics and you want to generate only a single topic instead of 3, then there is no such automatic functionality in RH.
I don't know if it will meet your needs, but snippets might allow you to manually do what you want. But it could be confusing for people in future and is a bit of work to set up. I would recommend deciding on a strict naming and folder structure to keep everything organised, and document what you have done, for anyone taking over in future.
I'll use 3 topics as an example, and assume you need an output with each topic separate, as well as a 4th topic with all 3 topics included. What you could do is copy the topic content into 3 snippets. Then delete the content from each topic and insert the relevant snippet. Finally create a new (4th) topic and insert all 3 snippets. When you need to update the content, you change the snippet and both the single topic and the combined topic are updated.
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