Setting the animation option for the consumable item component to block will cause the item to behave like a shield while consuming it.

Steps to Reproduce:

1. Run command

   /give @s stick[minecraft:consumable={consume_seconds:1000000,animation:block}]
   

2. Let a mob attack you while "consuming" the item

Observed Results:
Damage is negated and shield sound effects are played. Arrows bounce off and will trigger the "Not Today, Thank You" advancement. If attacker has an axe, it will disable the item temporarily.

Expected Results:
Item would play the block animation while otherwise behaving identically to any other animation option.