Man pages matching name devel::dumpvar in section 3pm:

Devel::Dumpvar.3pm.en	debian 10 / libdevel-dumpvar-perl
Devel::Dumpvar.3pm.en	debian 11 / libdevel-dumpvar-perl
Devel::Dumpvar.3pm.en	debian 12 / libdevel-dumpvar-perl