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

passagemath-ntl
10.4.28

This version was deleted from PyPI around 2024-11-07. Installing fails with:
$ pip3 install passagemath-ntl==10.4.28 ERROR: Could not find a version that satisfies the requirement passagemath-ntl==10.4.28