You are searching the AuditLog for a specific Advanced Setting for Detection Servers to see when it changed.
But you cannot find, or filter for, a specific Advanced Setting.
This leads to reviewing the AuditLog for many detection servers.
You want to be able to search the AuditLog for a quicker identification of changes to a specific Advanced Setting.
There is an existing feature request to be able to filter Audit Logs for a specific Advanced Setting.
Please raise a support ticket and refer to this KB if you want to be added to the feature request.