This article introduces 'Network(RDMA NIC: RoCE v2) is certified for ESXi' check and provides details on why it might report the error and how to fix the error state.
vSAN 8.0U3
This health check checks whether the current ESXi release is certified for the RDMA NIC by the VMware Compatibility Guide (VCG).
Note: This check is only applicable when RDMA is enabled on the vSAN cluster.
It means that the current ESXi release is not certified for the RDMA NIC by the VMware Compatibility Guide (VCG).