You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

shared-atomic-enterprise
1!3.3.2

This version was deleted from PyPI around 2025-04-16. Installing fails with:
$ pip3 install shared-atomic-enterprise==1!3.3.2 ERROR: Could not find a version that satisfies the requirement shared-atomic-enterprise==1!3.3.2