Man pages matching name sd_seat_can_tty in section 3:

sd_seat_can_tty.3.en	debian 10 / libelogind-dev-doc
sd_seat_can_tty.3.en	debian 10 / libsystemd-dev
sd_seat_can_tty.3.en	debian 11 / libelogind-dev-doc
sd_seat_can_tty.3.en	debian 11 / libsystemd-dev
sd_seat_can_tty.3.en	debian 12 / libelogind-dev-doc
sd_seat_can_tty.3.en	debian 12 / libsystemd-dev