This sucks. Mastodon doesn't pull toots the followed user posted before being followed. So you have to go to their profile on their instance in order to see older posts. Well, I use social networks mainly for updates, but that's just counter intuitive. Also, this issue is 2+ years old and is still pretty much a wontfix: https://github.com/tootsuite/mastodon/issues/34
Private instance for fsLeg where anything goes.