It's being worked on, Sync is a very mature app whose codebase had to be migrated over from Reddit's API. An MVP was prioritized over more advanced features like posting.
As a developer, if I was able to release what this dev did in the time they did it, I would be losing my mind. This person is obviously working like crazy (and in a very smart manner) to do what was done. You have to choose what to focus on.