It would be great if we can add additional fields to the 'Workload by assignee' pop-up on a sprint. The goal is to add a custom field [that we have created to track the story point estimation done by the development team] to help us quickly see how estimations are done by different teams like Developers, Testers while working on issues.

Currently 'Workload by assignee' just shows Assignees, Count of Issues, and the field used for Estimation on the respective Board.