Azure IoT Hub doesn't act as Telemetry database for querying the data. Indeed it's storing the data for the specified time defined in the retention policy but you don't have a direct access to it from the portal.
To get the data you can do the following -
Create a Message Route on the Device Telemetry Messages that will route your messages to an external ...
Here are a couple of articles that may explain it for you.
From the first link. Basically seems to me that by default the data is ...