Man pages matching name dpkg::parse::packages in section 3pm:

DPKG::Parse::Packages.3pm.en	debian 10 / libdpkg-parse-perl
DPKG::Parse::Packages.3pm.en	debian 11 / libdpkg-parse-perl
DPKG::Parse::Packages.3pm.en	debian 12 / libdpkg-parse-perl