Man pages matching name config::model::models::dpkg::copyright::fillblanks::pattern in section 3pm:

Config::Model::models::Dpkg::Copyright::FillBlanks::Pattern.3pm.en	debian 10 / libconfig-model-dpkg-perl
Config::Model::models::Dpkg::Copyright::FillBlanks::Pattern.3pm.en	debian 11 / libconfig-model-dpkg-perl
Config::Model::models::Dpkg::Copyright::FillBlanks::Pattern.3pm.en	debian 12 / libconfig-model-dpkg-perl