Product : VMware, VMware Cloud on AWS/Current, VCF
Feature : Host Reboot, Level of Access, Operations
Content Owner:  Graham Barker
Yes however updates are managed by VMware as part of the contract.
The entire SDDC is updated by VMware. Notification is provided ahead of time unless the update is critical. An additional ESXi host is added to the cluster (free of charge) to enable non-disruptive upgrades by using vMotion to move one hosts worth of workloads onto the new host while the hosts are upgraded