Man pages matching name extutils::typemaps::objectmap in section 3pm:

ExtUtils::Typemaps::ObjectMap.3pm.en	debian 10 / libextutils-typemaps-default-perl
ExtUtils::Typemaps::ObjectMap.3pm.en	debian 11 / libextutils-typemaps-default-perl
ExtUtils::Typemaps::ObjectMap.3pm.en	debian 12 / libextutils-typemaps-default-perl