Had several questions about how the main "Home" feed works on Mastodon. Here's what it shows:
1. All posts from all accounts you follow in chronological order, newest at top
2. All posts shared by accounts or groups you follow
3. Posts that use hashtags you follow in chronological order, newest at top
...and that's it, there is nothing else on your Home feed. It doesn't push anything else at you and it doesn't hide anything from you unless you ask it to. No algorithms.