Man pages matching name extutils::typemaps::stl::string in section 3pm:

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