I noticed that there are some recipes by default, wanted to be able to change these recipes without duplicating them, is it possible?
sorry if this information already exists somewhere, I couldn't find it on the Wiki

All you need to do is to place your recipes in the alloy_forgery namespace in your datapack and give them the same name as the ones in Alloy Forgery - that should override them just fine

Feel free to ask back if you have more questions
Cheers