Visible at https://tools.wmflabs.org/bd808-test/si.php:
$_SERVER['HTTP_X_FORWARDED_PROTO'] http $_SERVER['HTTP_X_FORWARDED_PORT'] 8080
I expected to see https and 443 so that apps can inspect these settings when generating canonical URLs. Our proxy in front of a proxy setup is non-standard so it is not unexpected that this is going to require some customization in the nginx ingress.