How would I make a Data-driven custom crafting that can have recipes in it altered or added by other developers?

So, I have a custom crafting station that is used in my mod. i had posted a forum about this before, but this is slightly different with more to it, so i felt the need to make a new topic.

Basically, I want to create a crafting station that allows any datapack to alter or add custom recipes to it without having to go through MCreator procedures. If this requires custom code, which it most likely does, I'm okay with receiving help because I kind of know what Im doing with that. 

Alternatively, how could other developers create custom recipes using the current procedure system? Are they able to? What I mean is basically going into the json file to add their own items to replace existing ones in the custom recipes from other mods.

JUST for clarification, this is NOT vanilla crafting, this is a custom station I made using GUI.