Hello,
I was unable to find any information on this in the provided documentation:
Is it possible to configure the AIO Tests Panel in Jira to show the Estimated and Actual effort for linked Test Cycles?
From what I've seen, you can edit the visible columns for the Cases tab (although only Estimated effort is available, not Actual Effort, but there's no such option for Cycles - there's only Key, Title, Progress, Start and End dates.