I’m not sure what version they’re running on their flagship but I last posted from there on March 20th and my blog federated to Mastodon.

More for the OP but if you’re looking for a blog with a comment section, I wouldn’t recommend WriteFreely at present. Customization is also unnecessarily painful.

It does federate. Social features are rudimentary. I end up using my existing microblogs to promote the posts anyway.

I knew all that going in and chose it anyway. It’s not for everyone but it does what I need it to at a price I’m fine with.