@wojtek, thanks. I was probably thinking of how they are in source:
…not considering that they appear [1] to be transpiled into DLL format for distribution:
dnf5 repoquery -l kf6-breeze-icons-6.13.0-2.fc42.x86_64
Updating and loading repositories:
Repositories loaded.
/usr/lib/.build-id
/usr/lib/.build-id/7b
/usr/lib/.build-id/7b/19f618ff61f7a3d714c34d7cbaa51cfbd4eb09
/usr/lib64/libKF6BreezeIcons.so.6
/usr/lib64/libKF6BreezeIcons.so.6.13.0
/usr/share/doc/kf6-breeze-icons
/usr/share/doc/kf6-breeze-icons/README.md
/usr/share/licenses/kf6-breeze-icons
/usr/share/licenses/kf6-breeze-icons/COPYING.LIB