There is no indication of communication errors in the vmware_vrlcm.log.
Aria Operations Manager 8.18.x
Aria Operations for Logs 8.18.x
Aria Lifecycle Manager 8.18.x
The integration is not yet configured.
https://docs.vmware.com/en/VMware-Aria-Suite-Lifecycle/8.18/lifecycle-install-upgrade-manage/GUID-78E00CF6-B303-4984-B551-ECB24D26B1C4.html is a guide on how to configure the integrations to work together for displaying health status.
https://sim.esp.spespg1.vmw.saas.broadcom.com/Interoperability?col=1425,18335,10107&row=116, indicates that 8.12.2 should work with 8.18.0 or 8.18.1 of Aria Operations.
The download for 8.12.2 is available here: https://marketplace.cloud.vmware.com/services/details/vmware-aria-operations-management-pack-for-sddc-health-monitoring-8-12-2-2?slug=true