Man pages matching name tcprules in section 1:

tcprules.1.en	debian 10 / ucspi-tcp
tcprules.1.en	debian 10 / ucspi-tcp-ipv6
tcprules.1.en	debian 11 / ucspi-tcp
tcprules.1.en	debian 11 / ucspi-tcp-ipv6
tcprules.1.en	debian 12 / ucspi-tcp
tcprules.1.en	debian 12 / ucspi-tcp-ipv6