Of course, python-docx is great, in file docx/oxml/shape.py，class CT_GraphicalObjectData may be update ro render chart file，

The origin class:

class CT_GraphicalObjectData(BaseOxmlElement):
"""<a:graphicData> element, container for the XML of a DrawingML object."""

pic: CT_Picture = ZeroOrOne("pic:pic")  # pyright: ignore[reportAssignmentType]
uri: str = RequiredAttribute("uri", XsdToken)  # pyright: ignore[reportAssignmentType]

updated class
class CT_GraphicalObjectData(BaseOxmlElement):
"""<a:graphicData> element, container for the XML of a DrawingML object."""

pic: CT_Picture = ZeroOrOne("pic:pic")  # pyright: ignore[reportAssignmentType]
cChart = ZeroOrOne('c:chart')  
uri: str = RequiredAttribute("uri", XsdToken)  # pyright: ignore[reportAssignmentType]

By add cChart = ZeroOrOne('c:chart') ，charts tools such as python-pptx can be supported well.