/usr/lib/nodejs
.
Since the release of Buster, these files should be installed under
/usr/share/nodejs
(for arch *independent* modules) or
/usr/lib/$DEB_HOST_MULTIARCH/nodejs
(for arch *dependent* modules)
instead.
.
You can use pkg-js-tools auto installer to avoid this, see
/usr/share/doc/pkg-js-tools/README.md.gz