Man pages matching name envz_add in section 3:

envz_add.3.en	debian 10 / manpages-dev
envz_add.3.es	debian 10 / manpages-es
envz_add.3.ja	debian 10 / manpages-ja-dev
envz_add.3.en	debian 11 / manpages-dev
envz_add.3.es	debian 11 / manpages-es-dev
envz_add.3.fr	debian 11 / manpages-fr-dev
envz_add.3.ja	debian 11 / manpages-ja-dev
envz_add.3.en	debian 12 / manpages-dev
envz_add.3.es	debian 12 / manpages-es-dev
envz_add.3.fr	debian 12 / manpages-fr-dev
envz_add.3.ja	debian 12 / manpages-ja-dev