Lenovo's XCC (used on ThinkSystem servers) supports SNMP alongside Redfish. Here's where the setting lives, since it's named differently than Dell or HPE's equivalent.
It's under BMC Configuration > Network > SNMP in the XClarity Controller web interface, a level deeper than Dell's or HPE's equivalent page.
Both v1 and v3 agents ship disabled. Enable SNMPv3 and set an authentication and privacy passphrase rather than falling back to the simpler but unauthenticated v1 agent.
Point Linivo at the XCC's dedicated management IP and the SNMPv3 credentials you just created; polling starts immediately once the agent responds.