Since Python 3.8.0a4, extension modules are no longer linked against libpython3.8.so.1.0. As a result, some of them are not linked against anything at all. And that is fine. They are not used as standard shared libraries.
They are loaded from Python and Python is already linked against libc. See https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/thread/QGJEDBFN7OXMP7OVTSVBO4DCGTX4K4WI/