This is the Botany Data pack. Something that inspired the apple crafting recipe was another data pack. So here is the link to that data pack: https://www.planetminecraft.com/data-pack/special-trees-1-15-2/



Features:

Craft apples out of dark oak and regular oak leaves.
You can now smelt potatos and carrots in a furnace or blast furnace into sugar. (potatos turn into baked, so they must be done in a blast furnace.)
Turn sugar that was smelted back into sugar cane by putting a seed to the left of sugar so you can make more uses for it.

Put bone meal with any type of crop to get extra!