Man pages matching name fincore in section 1:

fincore.1.en	debian 10 / util-linux
fincore.1.de	debian 11 / manpages-de
fincore.1.en	debian 11 / util-linux
fincore.1.de	debian 12 / manpages-de
fincore.1.uk	debian 12 / manpages-uk
fincore.1.en	debian 12 / util-linux-extra