Man pages matching name json::backportpp::compat5005 in section 3pm:

JSON::backportPP::Compat5005.3pm.en	debian 10 / libjson-perl
JSON::backportPP::Compat5005.3pm.en	debian 11 / libjson-perl
JSON::backportPP::Compat5005.3pm.en	debian 12 / libjson-perl