@ibmfur I reached out to the Workfront Product team for some insight here and here is what they said around integration Workfront + CJA:
We don't currently have a CJA connector, however, customers can connect to CJA using the Adobe Authenticator app or universal connector.
You're also more than welcome to reach out to the Customer Support team and check with folks with experience in Integrations to see if they additional information if you need more context.