Yes, the project is still under development, but a preview of Chapter 3 is available to Pareons. By the way, the author is on vacation this month, so it will take some time to see the next update.
I hope it's really a vacation, because the author hasn't replied or posted any new messages on Twitter.
As a scientist this reminds me of my (many) projects _(´ཀ`」 ∠)