How notify when "no data" in multiple instances?

Hi, I’m using Grafana v9.0.2, and multiple servers are monitored.

Now, as follows, I’ve been monitoring load averages.

Grafana will be notified when the load average of a one server goes above 2, but down one server does not notify me.
In this case, Grafana may want to notify which server is “no data”.
Is this possible?

In addition, “Configure no data and error handling” setting is as floowes.
It always return “Normal” when press “Preview alerts”, even if one of the servers is down.

※Sorry for my poor English.