> The guidelines for platform support are explained in PEP 11 (https://www.python.org/dev/peps/pep-0011/#supporting-platforms). We don't support platforms unless we have maintainers and CI (builtbots) in place for the platform.

You don't need to support a platform. Just call it unsupported and ignore issues if people report them unless they provide a patch themselves.

FWIW, the Python interpreter has never caused any issues on any platform that we support in Debian. We are regularly building the latest upstream versions of all available Python interpreters thanks to the packaging work of Matthias Klose.

You can view test results any time by going to https://buildd.debian.org/ and searching for "pythonX.Y". So there is actually a CI for release builds.