#RSS fans!
To get an RSS feed for a user:
https://<server>/@<name>.rss
https://<server>/users/<name>.rss
For a hashtag:
https://<server>/tags/<tagname>.rss
example:
https://noagendasocial.com/@csb.rss
https://noagendasocial.com/tags/gardening.rss
You can get RSS feeds of any specific tag in https://fedi.directory by adding /feed/ to the end of the tag's URL.