Closest thing I can think of is this one: https://feedland.org

Or you create a blog for yourself and you make a blogroll.

As for discovering new blogs, couple of options but there are more out there: https://ooh.directory, https://blogroll.org/

Well, my guess is that OPML is underrated. And I understand that, because it's so different from the social media that we are used to. On my homepage (link in bio) you can find all the feeds that I follow, available as an OPML file. It might be of interest to you, it might not (probably a lot of blogs you know from here, at least half of my 2000 feeds).

One 'dream' of me is to have OPML be the discovery-glue between all kinds of individual personal websites and blogs. But this requires critical mass to have enough to discover and explore, and it needs some fun/interesting software way to do that.