Let me know if this is the correct place for this type of feedback.
The troubleshooting page of the IDN Workday source has reference to XML which would be for IIQ. This ideally would represent the correct JSON formatting to add to a source. Doc is here: Troubleshooting and the XML is under the
Error: While provisioning of PHONE_HOME, PHONE_WORK, ADDITIONAL_PHONE_HOME, ADDITIONAL_PHONE_WORK attributes an error message appears section.
EDIT: There are actually multiple sections in troubleshooting with XML references, not just the one in the screenshot I called out. Not to mention other connectors as well such as Active Directory.