Thanks for the fast reply!
I'm using Nintex for SharePoint Online; not sure if that makes a difference. I'm not seeing this item. Looked under:
Perhaps, I'm not looking in the right place. Can you tell me where to find
Last Task Respondent Display Name
On the Office 365 version you can get the "Approver Comments" item property and then extract the Approver with a regular expression.
Perhaps this post is useful for you >>> How to know who approved or rejected a request approval task