How does a web app retrieve data from the Enterprise SSO extension?

The premises are Open ID Connect, Redirect Extension and a supervised iOS 13 device running with MDM. The extension triggers and the host app successfully retrieves HTTPURLResponse and Data the extension.

The flow is as follows:
  1. Host app calls AssociatedDomainURL.

  2. The SSO extension make an API call to AnotherURL.

  3. Inside the extension's beginAuthorization(with:), call complete(httpResponse:httpBody:) and pass AnotherURL's HTTPURLResponse and Data.

  4. The host app retrieves AnotherURL's HTTPURLResponse and Data through the extension.

In a web browser, the extension triggers when AssociatedDomainURL is entered into the search bar. How does a web app AnotherURL's HTTPURLResponse and Data like the host app?

It's a long shot as two years passed, but have you found the answer?

How does a web app retrieve data from the Enterprise SSO extension?
 
 
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