These are examples of enma activating and taxing zoro
Zoro learned the secret to taming enma when he chose not to stabilize his haki any more
funny enough i thought from this panel above it meant that zoro would have to go all out or enma would act out but thats not the case In egghead enma has not done this even once, whether or not zoro is grabbing enma,using enma to block attacks,using enma vs lucci etc or from the looks of it starting to use Koh state enma isn't acting out against zoro will.