How is Auth0 handling the change in behavior for Google login?
According to this link, google no longer allows webview logins. How is Auth0 handling this change?
For supported platforms/stacks that had libraries that could have been triggering the use of web views there will be either new versions or replacement libraries that allow you to use Google supported methods.
However, given this issue is at the client application level there will need to be updates from the developers of those client applications in order to make use of these updated/new libraries.