Existing csv-upload for encounters support only form1 obs. The following is the way to write CSV header for a concept height Inside obsGroup BMI Data in a form Vitals(form1).
We are planning to extend this for forms2 for a concept height inside section BMI Data in a form Vitals(form2)
Repeat.1.Obs.forms2.Vitals.BMI Data.Height (Observe the keyword forms2)
The implementation details for forms2 is to set proper form-field path using form metadata JSON.