External IDP (e.g.Google) | Application (e.g. Azure Entra)
------------------------- | ------------------------------
create an app in google dev console | Configure Google as IdP
gets client ID ---> | fill in client ID
gets client secrect ---> | fill in client secrect
fill in redirect URIs | <--- Find URIs from MS official website
After above, google can be added as an IdP in user flow.
reference:
https://learn.microsoft.com/en-us/entra/external-id/customers/how-to-google-federation-customers