Man pages matching name unlocked_stdio in section 3:

unlocked_stdio.3.en	debian 10 / manpages-dev
unlocked_stdio.3.es	debian 10 / manpages-es
unlocked_stdio.3.ja	debian 10 / manpages-ja-dev
unlocked_stdio.3.pl	debian 10 / manpages-pl-dev
unlocked_stdio.3.zh_CN	debian 10 / manpages-zh
unlocked_stdio.3.zh_TW	debian 10 / manpages-zh
unlocked_stdio.3.en	debian 11 / manpages-dev
unlocked_stdio.3.es	debian 11 / manpages-es-dev
unlocked_stdio.3.fr	debian 11 / manpages-fr-dev
unlocked_stdio.3.ja	debian 11 / manpages-ja-dev
unlocked_stdio.3.pl	debian 11 / manpages-pl-dev
unlocked_stdio.3.zh_CN	debian 11 / manpages-zh
unlocked_stdio.3.zh_TW	debian 11 / manpages-zh
unlocked_stdio.3.en	debian 12 / manpages-dev
unlocked_stdio.3.fr	debian 12 / manpages-fr-dev
unlocked_stdio.3.ja	debian 12 / manpages-ja-dev
unlocked_stdio.3.pl	debian 12 / manpages-pl-dev
unlocked_stdio.3.zh_CN	debian 12 / manpages-zh
unlocked_stdio.3.zh_TW	debian 12 / manpages-zh