Hi everybody! 
I’m more than happy to announce that it is now possible to create approval tasks in Asana 
We have recently implemented this feature and you can learn more about it the following announcement: A new type of task is available in Asana. Meet Approvals!
We hope you enjoy it! I’m closing this thread now but if you have any follow-up questions or feedback to share please let us know here or in the #productfeedback category ! We’ll be more than happy to help you!
Have a great Wednesday!