Leaving the post up in case anyone wants to use OpenRss.
Open RSS is a volunteer non-profit that provides free RSS feeds. They've indexed kbin.social, which means that any magazine on the instance has an RSS feed available through their site, using the following syntax:
Now what's doubly cool, is that if you're a magazine or community from an instance outside of kbin.social that's been indexed by kbin.social, Openrss has a feed for you too. Examples of communities outside kbin.social:
TIL - thanks much for pointing that out! Posting an edit at the top, because I'd been searching for where that functionality was for far too long, and couldn't find it in the documentation.