stream.wikimedia.org is a public eventstreams instance, and as such only exposes an explicitly declared list of streams that do not have PII.
We recently added a nice browser UI to eventstreams. https://stream.wikimedia.org/v2/ui. It'd be handy to have an internal instance deployed to make viewing and debugging streams easier. We'd have to ssh tunnel to that instance (unless we put it behind SSO?), but even that would be nice.
Since an eventstreams instance can only be connected to a single Kafka cluster, we can only expose streams that exist in our 'aggregate' kafka cluster: jumbo-eqiad (which is not cross DC).