For now, we use auth0 on website that use multiples domains. We use the silent login in a hidden iframe to extend the session of the user and to allow a single logout as described in the documentation.
As we have more and more trouble with browser that use ITP we investigate to use refresh token rotation.
that flow still allows multidomain login and extend of user session but what about single logout? How can we achieve to logout the user on other domains when he log out from one?