DarthAngelus is at chapter 24 already! He also says chapters 25 & 27 are finished, with chapter 23 being nearly finished. CHapter 22 is the latest available on his actual channel for us to see.
It also appears he’s picked some some new subscribers for his channel soon after the official Ahsoka trailer was released: https://www.youtube.com/watch?v=_jxPoV2xlYE