pkg-kde-tools' --with kf5 dh sequence currently doesn't list-missing or lintian because we have the kubuntu version and they didn't hold on to the patch.
Somewhat related to T9306. A more useful option may be to pursue dh_missing and dh_lintian as central actors (latter isn't run by default AFAIK though)
[09:22] <acheronuk> sitter: kubuntu have patched pkg-kde-tools to get the list-missing and lintian back with dh --with kf5 [09:22] <sitter> acheronuk: are you sure that's working because we simply use the kubuntu pkg-kde-tools [09:23] <acheronuk> sitter: I mean in cosmic