According to the 12.4 documentation:
By default, a report server generates SNMP traps version 1 that supports
only IPv4 addresses. If you want the notifications to also include IPv6
addresses, you must use SNMP traps version 2 and modify the
commonAlarm-hcbs.properties configuration file on the report server.
SNMP v3 is not supported yet - please follow this product idea to stay informed.