The Service Bus Explorer allows users to connect to a Service Bus namespace and administer messaging entities in an easy manner. The tool provides advanced features like import/export functionality or the ability to test topic, queues, subscriptions, relay services, notification hubs and events hubs.
Masstransit scheduled on the topic level not queue. Please see
https://github.com/MassTransit/MassTransit/issues/2705
It seems we cant see these messages in service explorer.