As shown in the screenshot below, the vSphere Client Alarms do not indicate which specific type of HCX tunnel has experienced a status change.
Alarm name is "HCX Interconnect Service Mesh ## Appliance Tunnel State Change".
VMware HCX
VMware vCenter Server
This is the expected behavior according to the current product specifications.
To identify the specific tunnel affected, please check the details via HCX UI > Administration > Alerts.
Refer to the example screenshot below. You can see "transport tunnel", "encryption tunnel" and "service pipeline" status.