Here's Zan confirming Vostyok is involved a couple years ago:

steamcommunity.com/app/1072150/...

Still not sure if it's still in production or not, but I think I've seen a mention of it or two since.

THE MOST IMPRESSIVE DOOM TC MOD
Ashes video is now up!
youtu.be/1zJ6KQYL7mE
#Ashes2063 #Vostyok #DoomTC #VTuber #Furry

Ashes 2063 (2018)

Developed by Vostyok.