Its predecessor (mkdocs material) supported blogs via a plugin and rss feeds via a mkdocs plugin (https://guts.github.io/mkdocs-rss-plugin/). I don't believe it supports blogs yet according to this: https://zensical.org/compatibility/#phased-transition-strate... but will in the next phase when it supports plugins.
It doesn't support loading content from a database that I'm aware of, it uses markdown files on disk as input.