You can configure it to make your author page also your ActivityPub profile (compatible with Mastodon). Once people subscribe to that author account, they will get notified of new posts and see them in their timeline. But IIRC there’s no support for historic entries, i.e. people will only see new entries from the moment they subscribed onwards.

E.g. my blog is available as @mbirth@blog.mbirth.uk within the fediverse. If you go there, you’ll most probably see an empty profile. Only when you follow that account, you’ll see future entries pop up in your timeline.

Feedle seems to be a normal RSS directory, but they make lots of noise on Mastodon - so I guess a lot of the blogs listed there will have some Fediverse representation as well…