Bluesky supports them! If you append `/rss` to any profile, it redirects to a feed. e.g.:

https://bsky.app/profile/xavd.id -> https://bsky.app/profile/did:plc:fp2izjrrcsbsqphlu7f5sixa/rs...

More info: https://openrss.org/blog/bluesky-has-launched-rss-feeds