As of version 2023.g, Open BIM Quantities can read and display IFC model elements ("IfcElement") that contain other elements. This feature allows users to explore the relationships between different elements of the model in a more complete and detailed way.
When using the "View" mode by "Structure", components that are part of an element can be seen in the "Entities" tree. Examples of such a situation are walls ("IfcWall") and the relationship with their openings ("IfcOpeningElement"), as well as the subordinate parts of a building element ("IfcBuildingElementPart") and their relationship with the main component.