Multiple item textures with the same base item.

Yo, ive been working on a food based data pack for a bit now. Im pretty new to recourece packs and datapacks. However as I've been working on the texture pack for the food, the second model for the spicy kebab wasnt working. I have been trying to fix it for a while myself yet considering how simple the code is I'm stumped at the potential issue.
I'm aware in recent versions of Minecraft resource packs are able to load any model and would likely work better then custom model data, yet im completely unsure how to do that.