Inside of a crafting terminal, any one block recipe (such as stone -> stone button, or diamond block -> 9 diamonds) can be placed in the terminal, and the crafting output can be shift clicked or regular clicked infinitely without the item placed in the crafting terminal disappearing. In a matter of minutes I was able to turn 1 diamond block into 9 chests full of diamond blocks.

Okay so on further inspection it is actually taking items from the storage but it is still duplicating. For example I have 8k zinc ore in the storage and nothing else. I place one diamond block in the crafting terminal, and shift click the diamonds in the craft output and it will fill my inventory with diamonds, taking away that number from the zinc in the storage. However you of course can just do it with zinc/ whatever item is already in the inventory and then do it infinitely.

I think this was fixed here 09533a1#diff-f80f6f34b5a97a2a34c2be31f4a65852530ff8250f6cdaf43af59a3b1d567f98

But not for older versions of Fabric like 1.20.1