

Correct, it is mobile only. Unfortunately, I think I must be misunderstanding what you’re saying about the OP stuff. This is my view, the way I think about it at least, these are all “OPs”, ones with a plus sign next to the leftward arrow have comments.
And then if I tap, I get the op with its comments underneath it.
Seems to be a kind of online conference. For being open source focused it’s opening is very salesy/buzzword salad-ish.
"Open protocols, not closed platforms. The Fediverse, Mastodon and ActivityPub. ATmosphere, Bluesky and AtProto. Human connections, not AI bots, nor fake news nor manipulative algorithms. New funding models. New forms of governance. Better trust and safety. Direct relationships to stakeholders and customers. Interoperability across social platforms everywhere, and so much more.
After a decade of stagnation, next-generation social media is breaking out of the closed silos and connecting the world into a global, open social web. It’s a wild world full of opportunity.
FediForum brings together the leading thinkers and doers who build this new Open Social Web."