Timestamp column in External Tasks Log?

the External Tasks Log in the Cockpit seems to be missing a Timestamp column. That information is most likely available in the database and it would be very useful for us to see at which time a worker completed a certain task. Is there a way to configure it to be visible?

We cannot differentiate by topic as our processes run the same topic lots of times. From the information in the Cockpit it seems to be impossible to stick that together: The Job Log shows a Job ID, the Audit Log shows an Activity Instance ID but neither seems to be related to the External Task ID in the External Tasks Log.