In the Synapse Sandbox environment as I'm hitting the add virtual doc endpoint (https://docs.synapsepay.com/docs/adding-documents), I get back a status of "SUBMITTED|REVIEWING".
How long does it take the Synapse system to review a SSN?
Answering my own question here ...
In regards to response value for a SSN virtual doc, document verification is done asynchronously. Therefore, I should always expect that the API response status for a doc will be "SUBMITTED|REVIEWING".