This is a tracking bug that tracks all problems in Python RPM packaging ecosystem (macros, generators...) preventing builds of Python RPM packages targeting alternate Python versions. The goal is not to ship such alternate stacks in Fedora, but rather to allow downstream projects (such as RHEL) and enhancement project (such as 3rd party repos) to do that.
Closing now, there is nothing more we are aware of. Please reopen if this tracker is needed once again.