Man pages matching name debian::dpkgcross in section 3:

Debian::DpkgCross.3.en	debian 10 / libdebian-dpkgcross-perl
Debian::DpkgCross.3.en	debian 11 / libdebian-dpkgcross-perl
Debian::DpkgCross.3.en	debian 12 / libdebian-dpkgcross-perl