For federated comments on @write_as, I'm gonna start with just exposing Remark.as comments to the fediverse. This should at least get the basic data there, though you still won't receive replies from Mastodon etc.
Then I'll work on receiving replies from the wider fediverse, and finally moderation tools. We'll see how it looks with replies showing up in the Remark.as UI, and then maybe move to showing comments on blog posts themselves.