Ive got no idea how something like this would work, never even looked at how modding works, but I know the current mod that sounds like it does this is reportedly broken. Would it be difficult to throw together a mod that made either some kind of variant of the crockpot that could cook wood into charcoal, or a variant of the firepit to burn stuff into charcoal? burning down forests to get one piece per tree is, kind of insane. The current (broken i guess) mod that did something like this made the firepit harvestable, which sort of works, except it means im turning piles of manure into charcoal, and is, well, broken/out of date for like 2 years.