Only an Org Admin can view Licenses that have been issued to your Organization.
You can filter your Licenses by
You can click on the DETAILS button to bring up the License Details page including a list of the devices registered with that license.
You can also click on the EDIT button of a certain device to bring up the Edit Device page, where you can decommission or reactivate the device by toggling the option in the Status field.
You will not be able to register a new device or take a new measurement with the license if any of the following are true:
Your license has reached the device registration maximum limit which is displayed in My Licenses > DEVICE REGISTRATIONS
Your license does not have any measurements left which are displayed in Study Templates > MEASUREMENTS LEFT
Your license status is Expired or Decommissioned