/usr/include/KF5/BluezQt/bluezqt/ is in libkf5bluezqt-dev 5.18.0-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/KF5/BluezQt/bluezqt/adapter.h
/usr/include/KF5/BluezQt/bluezqt/agent.h
/usr/include/KF5/BluezQt/bluezqt/bluezqt_export.h
/usr/include/KF5/BluezQt/bluezqt/device.h
/usr/include/KF5/BluezQt/bluezqt/devicesmodel.h
/usr/include/KF5/BluezQt/bluezqt/initmanagerjob.h
/usr/include/KF5/BluezQt/bluezqt/initobexmanagerjob.h
/usr/include/KF5/BluezQt/bluezqt/input.h
/usr/include/KF5/BluezQt/bluezqt/job.h
/usr/include/KF5/BluezQt/bluezqt/manager.h
/usr/include/KF5/BluezQt/bluezqt/mediaplayer.h
/usr/include/KF5/BluezQt/bluezqt/mediaplayertrack.h
/usr/include/KF5/BluezQt/bluezqt/obexagent.h
/usr/include/KF5/BluezQt/bluezqt/obexfiletransfer.h
/usr/include/KF5/BluezQt/bluezqt/obexfiletransferentry.h
/usr/include/KF5/BluezQt/bluezqt/obexmanager.h
/usr/include/KF5/BluezQt/bluezqt/obexobjectpush.h
/usr/include/KF5/BluezQt/bluezqt/obexsession.h
/usr/include/KF5/BluezQt/bluezqt/obextransfer.h
/usr/include/KF5/BluezQt/bluezqt/pendingcall.h
/usr/include/KF5/BluezQt/bluezqt/profile.h
/usr/include/KF5/BluezQt/bluezqt/request.h
/usr/include/KF5/BluezQt/bluezqt/services.h
/usr/include/KF5/BluezQt/bluezqt/types.h