If you only supply itemID then you will get the plain version. These days there are modifiers in the item string that adds these labels like Timewalking or Mythic, item level upgrades, and so on.
I am sure if you provide the proper data to the tooltip, it will render the expected tooltip that you can scan. Note that it shows data based on your character and specialization, things like class trinkets will not show anything for you, if it's not your class. :P