This message is to help other new creators .
If you have the problem of unity newest update of version IAP version 4.11.0 dont showing and you are still in IAP version 4.9.4 . Follow my steps to fix this . Open Project Settings in unity editor , go in Services and open In App Purchasing and update to the lastest version there . I want to mention also , that im not from unity team .Im an game developer as you , trying to help you all having this bug .Version of IAP 4.12 will be out soon so dont worry about it .