No additional setup is needed in Workday (Rest and Soap) for OAuth 2.0 (User login flow) - Managed authentication. You can continue to create a Connector Profile.
Create the StackOne Connector Profile
1
Create a Connector Profile
Enable the connector and create a Connector Profile in your project. See Setup Connector Profile.
2
Link an Account
Once the Connector Profile is created, continue to link an account.