Man pages matching name debdiff in section 1:

debdiff.1.de	debian 10 / devscripts
debdiff.1.en	debian 10 / devscripts
debdiff.1.fr	debian 10 / devscripts
debdiff.1.de	debian 11 / devscripts
debdiff.1.en	debian 11 / devscripts
debdiff.1.fr	debian 11 / devscripts
debdiff.1.de	debian 12 / devscripts
debdiff.1.en	debian 12 / devscripts
debdiff.1.fr	debian 12 / devscripts