@kordumb This is an interesting problem; obviously, it would be in-theory easy to solve for people who write for only one publication, if the publication so desired.
@c has mentioned some type of tool he uses to create custom feeds of content, which perhaps could be used to create a feed of a writer’s work across publications—but someone would have to curate it (in a near-perfect world, the author him/herself would curate it and host it on his/her own website, “Follow all my work in this RSS feed”).
This feels like one of those projects that RSS would have evolved to tackle if it hadn’t been declared perfect and frozen in stone by Harvard. Hopefully someone in the IndieWeb is thinking about it, though, because it seems like a key piece of a reopened web.