Maybe not what you're looking for but Lemmy has been used that way.
Most microblogging platforms actually don't artificially limit the amount you can write, unlike Mastodon, so they can also work for macro-blogging.
Mastodon's character limit is pretty easy to change when self-hosting, but it has other limitations like a lack of even basic formatting and images inline in posts. I think that's true of several of the others as well.
I changed it by using GTS instead
Ghost might fit your needs.
Ok...but this looks way too enterprise?
It's a non profit and open source. But they do the same as WF, basically just an account that posts links to your blog.
Fediverse
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