My requirement is need to capture the start time and end time for each flow which are executed in a case. we have only start time property available on pxflow property but not finding the end time property
Remember that entry for a flow in .pxFlow() page group only exists till flow is not ended/completed, and after that it is removed from .pxFlow().
Question: PRPC maintains the Stage and step execution details under .pxStageHistory() page list, that holds starts and end date time of each stage and step that a case has traversed so far. Can you have a look and verify if that would help?