Man pages matching name coredump.conf.d in section 5:

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