As far as I’m aware, Friendica does this. One feed, lemmy posts, mastodon toots, and Pixelfed posts all there. Lemmy is trickier because you can’t follow people and depending on the way you look at it, comments can show up as individual posts.

I think a lot of us saw this coming for a while based on how they were treating the “smart” functionality and apps in general. A year or couple years ago they switched the app software and a bunch of functionality you had access to went away (scheduling, some metrics, etc). As long as I can plug the thing in and it charges, I’ll be okay but still…