Man pages matching name systemd-bless-boot in section 8:

systemd-bless-boot.8.de	debian 11 / manpages-de
systemd-bless-boot.8.en	debian 11 / systemd
systemd-bless-boot.8.de	debian 12 / manpages-de
systemd-bless-boot.8.en	debian 12 / systemd-boot