Man pages matching name pgobject::type::json in section 3pm:

PGObject::Type::JSON.3pm.en	debian 10 / libpgobject-type-json-perl
PGObject::Type::JSON.3pm.en	debian 11 / libpgobject-type-json-perl
PGObject::Type::JSON.3pm.en	debian 12 / libpgobject-type-json-perl