Man pages matching name dh_installdeb in section 1:

dh_installdeb.1.de	debian 10 / debhelper
dh_installdeb.1.en	debian 10 / debhelper
dh_installdeb.1.fr	debian 10 / debhelper
dh_installdeb.1.pt	debian 10 / debhelper
dh_installdeb.1.de	debian 11 / debhelper
dh_installdeb.1.en	debian 11 / debhelper
dh_installdeb.1.fr	debian 11 / debhelper
dh_installdeb.1.pt	debian 11 / debhelper
dh_installdeb.1.de	debian 12 / debhelper
dh_installdeb.1.en	debian 12 / debhelper
dh_installdeb.1.fr	debian 12 / debhelper
dh_installdeb.1.pt	debian 12 / debhelper