Man pages matching name snmp-user-based-sm-mib in section 7:

SNMP-USER-BASED-SM-MIB.7.en	debian 10 / erlang-manpages
SNMP-USER-BASED-SM-MIB.7.en	debian 11 / erlang-manpages
SNMP-USER-BASED-SM-MIB.7.en	debian 12 / erlang-manpages