Man pages matching name seccomp_rule_add_exact in section 3:

seccomp_rule_add_exact.3.en	debian 10 / libseccomp-dev
seccomp_rule_add_exact.3.en	debian 11 / libseccomp-dev
seccomp_rule_add_exact.3.en	debian 12 / libseccomp-dev