Hybrid Linked Mode allows you to link your cloud vCenter Server instance with an on-premises vCenter Single Sign-On domain. https://docs.vmware.com/en/VMware-Cloud-on-AWS/services/com.vmware.vsphere.vmc-aws-manage-data-center-vms.doc/GUID-91C57891-4D61-4F4C-B580-74F3000B831D.html

Hybrid Linked Mode is the solution that meets the requirement of viewing and managing workloads across both an on-premises environment and a VMware Cloud on AWS SDDC.Hybrid Linked Mode allows customers to link their on-premises vCenter Server with their VMware Cloud on AWS vCenter Server and use a single interface to manage both environments1.Hybrid Linked Mode also enables customers to perform cold and live migrations of workloads between on-premises and cloud SDDCs2.Hybrid Linked Mode leverages the existing vCenter Single Sign-On domain and does not require any additional components or licenses1.Reference:1: Hybrid Linked Mode - VMware Docs,2: VMware Cloud on AWS Documentation