Hi, I am not aware of any plans to add this as a feature of the REST API or Ansible. Typically going through sales is the best path to get features added. 
I have gone through the REST API document from here ([URL] it seems even the latest REST API cannot create a volume with specific configuration (e.g TDEV or BCV+TDEV) under the 'Create Storage Group' POST call. Is it a support feature on REST API or Ansible module? Or is there any roadmap to add this parameter into REST API?
Can PowerMax Rest API create a Storage Group and define the volume 
Configuration (e.g TDEV or BCVTDEV?)