Man pages matching name systemd-user.conf in section 5:

systemd-user.conf.5.de	debian 10 / manpages-de
systemd-user.conf.5.en	debian 10 / systemd
systemd-user.conf.5.de	debian 11 / manpages-de
systemd-user.conf.5.en	debian 11 / systemd
systemd-user.conf.5.de	debian 12 / manpages-de
systemd-user.conf.5.en	debian 12 / systemd