we all know that unicorn can’t eat carrots in mobile and we must have griffin kibble. We can also pick it up with argy. The thing is it won’t despawn if u give it a soothing balm. HOWEVER DONT GO INTO CAVES. When you go into a cave, spawns resets. I gave it a 10x soothing balm and then it despawned with it.
If it won’t allow you to feed it, knock it out and let it wake up then try again. Most likely due to the fact someone else tried to tame it before. Also, it tells you when to feed it at the bottom corner of your screen. PLEASE UP THIS