gh-146636: PEP 803: Reference documentation by encukou · Pull Request #148013 · python/cpython

Maybe setuptools is a poor example to use above then? Because setuptools expects users to set the build flags manually...

You could delete the "(For example, SetupTools)" above, or maybe refer to meson-python or scikit-build-core instead? These days that's what I recommend to people depending on if they already use CMake or not.