I would like the manager of procurement to be able to recall workflows they did not originate or delegate other user's work items specific to the requisition and purchase order workflows.

I would like the manager of accounts payable to be able to recall workflows they did not originate.

I do not want to give either of them system administrator rights.

Maybe a separate idea, per user I would like to give rights to be the delegate of the work items of the users they manage. For example a requisition is waiting to be approved by a project manager who is travelling, their manager, with a higher approval limit, should be able to approve it.