Man pages matching name hash::util::fieldhash::compat::heavy in section 3pm:

Hash::Util::FieldHash::Compat::Heavy.3pm.en	debian 10 / libhash-util-fieldhash-compat-perl
Hash::Util::FieldHash::Compat::Heavy.3pm.en	debian 11 / libhash-util-fieldhash-compat-perl
Hash::Util::FieldHash::Compat::Heavy.3pm.en	debian 12 / libhash-util-fieldhash-compat-perl