Mobs with knockback resistance do not take reduced knockback from punch bows

Mobs such as iron golems, ravagers, and hoglins should take reduced knockback from bows with the Punch enchantment. However, they do not.

To recreate: Spawn in an iron golem, a ravager, a hoglin, and a creeper so that they do not see each other. Enchant a bow with Punch II and shoot all four mobs. Observe that they all get knocked back the same distance.