Hello, PAM has two reports that you can run to get details on scheduled job performance, both accessible from the Credentials > Reports > Run page. The Scheduled Jobs report will provide overall scheduled job results. Note that the job will be regarded a failure as soon as one of the password updates inside the scheduled job fails. To get details on which update(s) failed, you use the Account Passwords Update Attempts report. It will list all password update attempts and include information on whether the update was initiated by a PAM user or by a scheduled job.
All information that is used to generate the reports also is sent to the configured syslog server, and you could create your own reports on your SIEM solution, see e.g. KB Email Notifications when a PAM Job runs successfully.