Zoglins are not affected by Instant Health effect and harmed by Instant Damage

They are affected by instant health like other mobs that are not undead. So they get healed like normal.

They are no undead mobs which means that they are not affected by the smite enchantment and the wither also attacks them.

Bro this was like the first thing I tested with them. I put Hoglins through the portal, they became zoglins, and I wanted to heal them. so I used instant health and then realized that it should damage them... it didn't