Maintainers for python3-libxml2 are Debian XML/SGML Group <debian-xml-sgml-pkgs@lists.alioth.debian.org>.
You may want to refer to the following packages that are part of the same source: libxml2-16, libxml2-dev, libxml2-doc, libxml2-source, libxml2-utils, python3-libxml2-dbg.
You might like to refer to the python3-libxml2 package page, to the Package Tracking System, or to the source package src:libxml2's bug page.
If you find a bug not listed here, please report it.