I am looking for the specific API endpoint descriptions related to this flow, but I am having trouble locating them in the documentation. Could someone please point me to the correct location for these API endpoint details?
The APIs for the Interaction Code are not publicly available, so you can’t directly use them via Postman/cURL.
You would either need to embed a Widget into your app, which will internally call the IDX endpoints, or you would need to use Okta SDKs to integrate the IDX flow in your application.