Tracking link customization (2 working hours)

Some of my orders are shipped without any track & trace. But once an order is fulfilled there is of course an "Track Order Button" on the overview site. Then the customer clicks on the button they get redirected to the shipping company but as some of those orders have no track & trace they just recieve an error, that it does not exist. Which causes conserns for the customers and many support tickets for us. Example orders from my store are : #67591 and #68412 - is there maybe an solution that you can display an info that there is not tracking available or remove the tracking button if for example the shipment code starts with "UE" (as in order 67591) or the shipment code is called "Untracked" (as in order 68412)?