Hi Tom
Please see the following Ansys Help entry on this; the convergence plots can be done either in the Cloud Wizard in Mechanical or from the Cloud Portal for the specific job:
https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/Cloud/v000/en/ans_cloud_compute/acc_monitor_solution.html
Also you can post Ansys Cloud specific questions here in its Forum:
https://cloudforum.ansys.com/
Mike