I need clarification as to whether or not Esri supports federation for using an ArcGIS Online or Portal account to authenticate into a third-party identity provider (IDP) rather than using a third-party to authenticate into ArcGIS Online/Portal. All of the Esri federation documentation on the web is showing how to use federation to authenticate into Esri. I would like to use Esri to authenticate into a third-party IDP. Similar to "login with Google", I would like the ability to "login with Esri".
Below is what I'm looking for: