Man pages matching name posixoptions in section 7:

posixoptions.7.en	debian 10 / manpages
posixoptions.7.ja	debian 10 / manpages-ja
posixoptions.7.en	debian 11 / manpages
posixoptions.7.ja	debian 11 / manpages-ja
posixoptions.7.en	debian 12 / manpages
posixoptions.7.fr	debian 12 / manpages-fr
posixoptions.7.ja	debian 12 / manpages-ja
posixoptions.7.ru	debian 12 / manpages-ru