While checking an SD-WAN Edge with a disconnected/down link via Network Overview tab in VCO, an Enterprise administrator may notice the VCO will not show this link and it may appear as if this link is not even present in the Edge
This is expected behavior. By default, the VCO will display Links in Disconnected/Down state in the Network Overview tab for only 24 hours, and after that time the VCO will no longer display any information about that Link
For Enterprises requiring additional time, there is a setting called "Edge Link Down Limit" that can be used to change this value. The instructions are listed below:
From the top menu:
For more details refer to this documentation