You can add recipe categories to `data.raw["utility-constants"].default.factoriopedia_recycling_recipe_categories` and have recipes belonging to those categories appear in a section titled "Recycling recipes" in factoriopedia.
This is useful for when you need to add new recycling categories for some reason.
Either way, it's missing from the documentation, despite it being viewable with the debugger.
Utility Constants missing factoriopedia_recycling_recipe_categories
Re: Utility Constants missing factoriopedia_recycling_recipe_categories
Thanks, fixed for 2.0.42.
I'm an admin over at https://wiki.factorio.com. Feel free to contact me if there's anything wrong (or right) with it.