Hi @SRossing,
If you’re looking to create an RSS feed specific to certain topics you can do this by using blog tags.
Once using blog tags, you can navigate to Marketing > Website > Blog > Tags
Click on the tag that you want to use which will open the page itself for all the posts using this tag.
Copy the URL from your search bar and add /rss.xml to the end of the URL.
This can now be used to build a blog notification email for a specific topic.
Hope this helps!