Federated blogging options?

Hi, I'm new to the fediverse. I'm looking at options for blog style content and I have some questions. I know there is WriteFreely and WordPress has a ActivityPub plugin, but from what I can see, what they do seems to be just posting a link to Mastodon when you publish a blog post. I mean, I can literally write on any blog platform and share the link on Mastodon. It does not feel like "federated blogging" if it doesn't do more than that. The kind of integration I have in mind is more like Lemmy, where you can read the content from another instance and interact with it (leave comments, be replied to, etc) without leaving the instance you are on. Am I missing something here? Thanks in advance.