Man pages matching name gss_inquire_saslname_for_mech in section 3:

gss_inquire_saslname_for_mech.3.en	debian 10 / gss-man
gss_inquire_saslname_for_mech.3.en	debian 11 / gss-man
gss_inquire_saslname_for_mech.3.en	debian 12 / gss-man