After creating an Auth. Provider (in my case it is Provider Type = "Salesforce"), I am presented in the Setup UI with 5 URLs under "Client Configuration", including the SSO Initialization URL and Callback URL.
I have the feeling that I recently stumbled upon an article how to retrieve these via Apex / SOQL / API, but I can't find it anymore and have no proof.
Is it possible to retrieve these URLs via SOQL, by providing just the Auth. Provider ID? If yes, how?