I’ve just added a score parameter to the community RSS feeds so you can get a RSS feed of posts at or above that score. e.g. https://piefed.social/community/fediverse/feed?score=20
If there is interest then we can add more filters, for flair/tag, etc. But from the server logs it doesn’t seem like many people use RSS.
I follow Lemmy RSS feeds from openrss because it localizes all of the feed links to my own instance regardless of the instance the RSS feed content is on. Wish Lemmy’s feeds this by default.
You can read more about them at this link: https://openrss.org/feeds/lemmy