I use in the Crafting Recipes the "Item Category Amounts" (example: for a fire you can use coal or fire wood). However, I do not see the needed amounts in the Crafting UI. Is there a simple method to change that?
The Crafting UI only works with ItemDefinition Ingredients by default.
If you wish to show item category options you will need to create your own crafting UI. The reason we did this is because most likely the player would want to choose the items they want to craft. And there are so many ways to do this that we decided to leave you the developer create a solution that best fits your game.
You can choose to inherit our crafting UI or start completely from scratch. I would still recommend using the Crafter and inherit one of our CraftingProcessors. This way you can just focus on implementing the UI part.