Man pages matching name sigblock in section 3:

sigblock.3.en	debian 10 / manpages-dev
sigblock.3.ja	debian 10 / manpages-ja-dev
sigblock.3.en	debian 11 / manpages-dev
sigblock.3.fr	debian 11 / manpages-fr-dev
sigblock.3.ja	debian 11 / manpages-ja-dev
sigblock.3.en	debian 12 / manpages-dev
sigblock.3.fr	debian 12 / manpages-fr-dev
sigblock.3.ja	debian 12 / manpages-ja-dev
sigblock.3.ru	debian 12 / manpages-ru-dev