If you're using the latest version of MCreator, there should be an option to 'enable collidable hitbox' on the first tab of the entity menu. Keep in mind though that this works for shulkers because they're the same size as a block and don't move. This can quickly get pretty janky for other entities.
If you're using the latest version of MCreator, there should be an option to 'enable collidable hitbox' on the first tab of the entity menu. Keep in mind though that this works for shulkers because they're the same size as a block and don't move. This can quickly get pretty janky for other entities.