VMware ESXi
Engage physical network team to check in the physical layer that if LLDP is configured correctly at hardware, physical switch, etc.
Refer following document for steps to enable LLDP on a DVS:https://techdocs.broadcom.com/us/en/vmware-cis/vsphere/vsphere/7-0/vsphere-networking-7-0/monitoring-network-packets/switch-discovery-protocol/enable-link-layer-discovery-protocol-on-a-vsphere-distributed-switch.html