No, I'm talking about the hypothetical algorithm that fills a page with things you might be interested in. Twitter has it (even though it's not necessarily good), even Reddit these days has some of that, it's a feature in most social media websites and sometimes quite a useful one, and Mastodon just lacks it altogether.

Bluesky does it the best. It supports community made custom algorithms, so I use a Discover feed to find people I like.