pip install pdfservices-sdk not installing pdfservices_sdk code folder

I am trying to install and use Adobe’s pdfservices-sdk Python package to extract structured data (like tables, text, and fields) from PDF utility bills and invoices.  The Installation succeeds, but the package is broken: after installing, there is no actual pdfservices_sdk code folder—just a metadata folder. The Python code for the SDK is missing. 

I am running on windows environment using this command  pip install pdfservices-sdk in my venv environment running python 3.11.9.  When I go to the site packages folder all I see is this folder pdfservices_sdk-4.1.1.dist-info.