File list of package qt6-qmllint-plugins in bullseye-backports of architecture amd64

/usr/lib/x86_64-linux-gnu/qt6/plugins/qmllint/libquicklintplugin.so
/usr/share/doc/qt6-qmllint-plugins/changelog.Debian.gz
/usr/share/doc/qt6-qmllint-plugins/copyright