Final Workflow and explanations of the different parts.
This in short is a JSON converter to RSS, with a step to base64 decode a google news URL, sanitize it and return the final destination, merge the data from the JSON and the decoded URL and then set and create an RSS feed served by a webhook on request.
Edited the “define feed item1” node to properly unescapeHTML (or the opposite if needed)
and added some more usage info on the main note.