Why can't I craft a notch apple now?
Solution 1:
After Minecraft 1.9, this recipe was removed, probably because it was rather OP, and gold blocks could be easily obtained by a gold farm. If you want more "Notch" apples, you may have to downgrade Minecraft to 1.8, and come back to 1.16 or whatever version you are using.
Solution 2:
The Enchanted Golden Apple (also known as "God Apple" or just "Gapple") had their crafting recipe removed in Java Edition 1.9, more precisely in 15w44a.
- Enchanted golden apples can no longer be crafted. - Minecraft Wiki