Man pages matching name pam_systemd in section 8:

pam_systemd.8.en	debian 10 / libpam-systemd
pam_systemd.8.en	debian 11 / libpam-systemd
pam_systemd.8.de	debian 11 / manpages-de
pam_systemd.8.en	debian 12 / libpam-systemd
pam_systemd.8.de	debian 12 / manpages-de