I have similar requirement of adding new user task after approval workflow started as mentioned in below question but in SharePoint Online that option is not available,
- User uploaded document.
- Workflow tasks for 4 member of Approval groups created
- now i want to add task for new user so that workflow will proceed further only if 4+1 member approve the documents.
I tried with Nintex workflow and MS Flow but once workflow started there is no way to add new task for new user without stopping the workflow.
Can anyone suggest me whether it is possible in MS Flow or Nintex.