Navigate to Interconnect --> Compute Profiles --> Try to create or edit a Compute profile. It fails with the error below./infra/sites/default/enforcement-points/default/transport-zones/ESXi-Overlay-TransportZone: Transport Zone not found
VMware HCX
Navigate to --> System --> Fabric --> Transport ZonesUP
Refer to the documentation to know about the requirements of Network Extension :- Requirements for Network Extension