NewsMast is out with quite an interesting update. Oversimplifying it a bit, but with this open sourced project, anyone can spin up what is essentially a custom feed server populated from relays and human curated content.
It can be included in ANY app, not just NewsMast.
Want a custom feed for Cat pics? Only posts about Taylor Swift? Have at it.
https://www.newsmastfoundation.org/blog-reimagining-the-fediverse