Does anyone know how to make 2d eye attach with 3d model's facde. then add rig his eyes to Able to m

I’m trying to make 2d eyes on my model character’s face. How do I stick on face and how to rig eyes on face. You know, moving up and down and side and move anywhere around on the face. Please answer if you know the question.

You can rotate the eyes on the head if you use the same origin as the head and shrinkwrap to it.
Small moves should be possible to.

Or you just change the texture coordinates if you want to put an eye texture on it.