How to Integrate Third Party Idp (SSO) with DCS

I am currently implementing Oracle Digital Customer Service (DCS) and have a requirement where end users must access the DCS portal via SSO using a third-party Identity Provider (OKTA), bypassing the out-of-the-box self-registration and signup process.

Background:
In the standard OOTB DCS flow, when an end user self-registers:

• A record is created in the Self Registrations object
• A Contact record is created in Fusion Service (or mapped to an existing Contact by email)
• An IDCS user is automatically provisioned with the Customer Self-Service User role
• Background jobs handle the synchronization and any configured approval workflow

The Challenge:
I have found Oracle documentation on integrating Fusion applications with a third-party IdP via IDCS using SAML / JIT provisioning. However, there is no documentation specific to DCS that explains what happens after the SSO login in the DCS context, specifically: