VMware Cloud on AWS is a managed service, and VMware handles the updates and patches to the infrastructure. When VMware notifies customers of upcoming maintenance or updates, it is usually for informational purposes, so the customer is aware. Unless there's a specific action item mentioned in the notification (which would be unusual), no action is required from the customer's end.

Upgrades for VMware Cloud on AWS SDDCs are deployed in a rollout across the service. When an upgrade rollout is available for your organization, you receive an email notification and a notification in the VMware Cloud Console. Typically, you receive this notification 30 to 60 days before upgrades begin for a rollout. After you receive the notification, you can submit a scheduling request for any of your SDDCs. So respond is required for initial schedule. If you receive the notification 7 days before start, this means you already responded to the proposed date and agree on it. https://docs.vmware.com/en/VMware-Cloud-on-AWS/services/com.vmware.vmc-aws-operations/GUID-EE89B216-BE93-4A1A-9280-8F20E2A5266F.html https://docs.vmware.com/en/VMware-Cloud-on-AWS/services/com.vmware.vmc-aws-operations/GUID-7725CAAC-BBDB-4F80-991F-1D1ADDE12216.html#GUID-7725CAAC-BBDB-4F80-991F-1D1ADDE12216