That is good idea as well! That would require me to actually run the server (or github actions) to refresh the RSS feed, maybe something I would do later on.
Can you please ping me once this is up? We'd love to expose this feed in search results inside Kagi.
There are quite common and they're usually called planet <topic>, which might help to find useful resources or software
A github action updating a static file is, well, webscale. And cheap/free to host.