Posting FHIR Bundle/Resources to OpenEMR FHIR API

According to the API docs you can only post the Organization, Patient, and Practitioner FHIR resource. I’m trying to post a Bundle to the FHIR server, is there is any way to post additional resources besides the 3 mentioned in the docs? Say for example I wanted to post an Observation resource what files would I need to modify?

Thanks in advance.