Man pages matching name sendfile in section 2:

sendfile.2.en	debian 10 / manpages-dev
sendfile.2.es	debian 10 / manpages-es
sendfile.2.ja	debian 10 / manpages-ja-dev
sendfile.2.pt	debian 10 / manpages-pt-dev
sendfile.2.en	debian 11 / manpages-dev
sendfile.2.ja	debian 11 / manpages-ja-dev
sendfile.2.pt	debian 11 / manpages-pt-dev
sendfile.2.en	debian 12 / manpages-dev
sendfile.2.fr	debian 12 / manpages-fr-dev
sendfile.2.ja	debian 12 / manpages-ja-dev
sendfile.2.ru	debian 12 / manpages-ru-dev