Yes, vSphere HA heartbeat also gets checked automatically if you connect vCenter from VI client. But not from the direct connection to ESXi from VI client.
You can check manually from host cluster : Right click on cluster>>edit settings>><if HA is enabled, you will get option :"Datastore heartbeating"> >> Once you click on ":"Datastore heartbeating", you will get datastore ticked for heartbeating.