Are you asking about book publishing or web blogging platforms (e.g. Wordpress / Medium / Ghost)?
I was thinking about web-blogging / Zettels (https://braindump.jethro.dev/zettels/), but not about a particular platform. Could be under writenext.io/.
We don't consider it as a short-term feature, but it's in our plans to make integrations with Wordpress / Ghost in the upcoming months.