If you are unable to see data for failed jobs or if there is a mismatch between the failed jobs data in the SQL performance monitor and the SQL insight monitor, check if you have granted the necessary permission.
Data in the SQL performance monitor:
Data in the SQL insight monitor:
If the SELECT permission is not given, you will not be able to get the details of the jobs, and you might get the following error in your agent log file:
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There is a mismatch between the number of failed jobs shown and the actual number of failed jobs