Wow this is such a clean and snappy Lemmy client, may become my new daily driver!
The “For You” feed looks like it has a similar focus as the one I have on Agora, which is a webapp for following people across the “extended Fediverse” as I call it (Mastodon, Bluesky, Threads, Nostr).
The For You feed on Agora utilizes a fork of the open source FediAlgo library to create a feed that combines interesting posts from people you follow, as well as friends of friends, and it learns your preferences based on whose content you like/boost.