User authentication through JWT

I have enabled authentication on our Jitsi Server. I followed these instructions: https://github.com/jitsi/lib-jitsi-meet/blob/master/doc/tokens.md

The authentication is working fine on the web and electron app. But with the mobile apps, the user is not redirected to our external identity provider. Instead, the native login dialog is displayed with username and password.

Did I miss a setting? Or do I need to customize the mobile application?