Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: File Format
USDEXPORTER_FILEFORMAT
Parameter: Zipped (*.usdz)
USDEXPORTER_ZIP
Parameter: Cameras
USDEXPORTER_CAMERAS
Parameter: Lights
USDEXPORTER_LIGHTS
Parameter: Geometry
USDEXPORTER_GEOMETRY
Parameter: Normals
USDEXPORTER_NORMALS
Parameter: UV
USDEXPORTER_UV
Parameter: Display Color
USDEXPORTER_DISPLAYCOLOR
Parameter: Vertex Color
USDEXPORTER_VERTEXCOLORS