Since cosmetics is related to herbalism, I don’t see a reason why it shouldn’t be part of this game in some or other way anyway.
I used to play The Guild a lot years ago, which I sill think as of some spiritual predecessor of KC:D, and it had one whole branch of industry/education centered around selling parfums, various potions and such with possibility to outlaw it via law and make it illegal. But the industry hasn’t stopped, just got into an illegality… one of the things that made that atmosphere of the game really great