Extracting Brep Element from Rhino into Speckle missing Faces

Hello Team,

I am working on extracting metrics from the elements of Rhino model and showing plots in my web app.
I deployed local speckle server in my machine.

I want to calculate area of Brep components but the area which is visible is the total area. I want to calculate only the bottom face area. When I digged into the JSON data of Brep component, it shows me only Reference Id within FacesValue key.
My Faces data is not visible once I send my model from Rhino to speckle.
Below is attached JSON data of Brep component

Brep element.json (11.3 KB)