We are trying to obtain some additional fields from the get incident API end point we have reached out to Datadog and they have informed us to obtain the additional data. We just need to add the filter statement to the API call. Here is the instructions we received from data dog to correct this missing data
"Datadog Incident API Call script doesn't include the custom attributes by default. To include custom attributes such as Postmortem review date (date), please include filter[field_type]=all as part of the endpoint. Please find the following script as an example that I've tested and is confirmed working from my side:
curl -X GET "https://api.datadoghq.com/api/v2/incidents?filter%5Bfield_type%5D=all" \
-H "Accept: application/json" \
-H "DD-API-KEY: ${DD_API_KEY}" \
-H "DD-APPLICATION-KEY: ${DD_APP_KEY}"