Man pages matching name systemd-timesyncd.service in section 8:

systemd-timesyncd.service.8.de	debian 10 / manpages-de
systemd-timesyncd.service.8.en	debian 10 / systemd
systemd-timesyncd.service.8.de	debian 11 / manpages-de
systemd-timesyncd.service.8.en	debian 11 / systemd-timesyncd
systemd-timesyncd.service.8.de	debian 12 / manpages-de
systemd-timesyncd.service.8.en	debian 12 / systemd-timesyncd