I see some folks migrating from Telegram to Matrix for obvious reasons. While I do use Matrix, and invite you to use it too, I can't say I like it very much. And then I thought. What is Matrix's response to Telegram's channels? I don't think there is any. But that's probably what Fediverse handles.
NB. Telegram channels are like chats, but only admins can post. There are also comments to posts that open in a separate view.
@bouncepaw I'm a fan of mattermost. It's not federated but I kinda like that. At least it's open source