/usr/include/KF5/ is in libkf5kcmutils-dev 5.18.0-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/KF5/KCMUtils/
/usr/include/KF5/KCMUtils/KCModuleContainer
/usr/include/KF5/KCMUtils/KCModuleInfo
/usr/include/KF5/KCMUtils/KCModuleLoader
/usr/include/KF5/KCMUtils/KCModuleProxy
/usr/include/KF5/KCMUtils/KCMultiDialog
/usr/include/KF5/KCMUtils/KPluginSelector
/usr/include/KF5/KCMUtils/kcmodulecontainer.h
/usr/include/KF5/KCMUtils/kcmoduleinfo.h
/usr/include/KF5/KCMUtils/kcmoduleloader.h
/usr/include/KF5/KCMUtils/kcmoduleproxy.h
/usr/include/KF5/KCMUtils/kcmultidialog.h
/usr/include/KF5/KCMUtils/kcmutils_export.h
/usr/include/KF5/KCMUtils/kpluginselector.h
/usr/include/KF5/KCMUtils/ksettings/
/usr/include/KF5/KCMUtils/ksettings/Dialog
/usr/include/KF5/KCMUtils/ksettings/Dispatcher
/usr/include/KF5/KCMUtils/ksettings/PluginPage
/usr/include/KF5/KCMUtils/ksettings/dialog.h
/usr/include/KF5/KCMUtils/ksettings/dispatcher.h
/usr/include/KF5/KCMUtils/ksettings/pluginpage.h
/usr/include/KF5/kcmutils_version.h