Man pages matching name pppdump in section 8:

pppdump.8.ja	debian 10 / manpages-ja
pppdump.8.en	debian 10 / ppp
pppdump.8.ja	debian 11 / manpages-ja
pppdump.8.en	debian 11 / ppp
pppdump.8.ja	debian 12 / manpages-ja
pppdump.8.en	debian 12 / ppp