Man pages matching name restartd in section 8:

restartd.8.en	debian 10 / restartd
restartd.8.fr	debian 10 / restartd
restartd.8.en	debian 11 / restartd
restartd.8.fr	debian 11 / restartd
restartd.8.en	debian 12 / restartd
restartd.8.fr	debian 12 / restartd