SIEM exported logs do not have the medium or high incidents shown in the Detect incident section under event logs.
Component: Investigate
Detect Incidents currently can only be exported from the Detect module.
To export these incidents, go to Detect > Incidents > Export Incidents option.
Because the Detect admin can adjust the Severity Thresholds, the resulting severity level might change. The admin can also use ThreatScore as a reference.