Variable for Approval Date on Assign Task to Multiple Users

The Assign Task to Multiple Users provides variables for Outcome, Task Responder, and a few others, but no date variables. You can use the "datenow" value in a date control to capture the approval/rejection date on the task form (see question here: https://community.nintex.com/automation-cloud-2/nwc-how-to-save-approval-date-of-each-approver-in-a-multi-approver-task-15928) but if you want to enable Express Approval, there's no method of tracking the response date. The instance tracks when express approvals happen, so it would be really nice if we had a task variable for these that we could loop for each approver. That way we could capture each approver's date, and enable the use of Express Approval in those tasks.