No Data Alerts for sub-hosts

I am trying to setup alerts for when servers stop sending data, i.e. a no data alert, but instead of for the whole panel, for each individual server.
I have the host field, as well as “System_Up_Time” which is getting regularly populated (so if it’s not recent, I know the server is not sending data), Any thoughts on how I’d get this to work? Using Grafana 8.4.4

what version of grafana are you running? and are you using the legacy alerting platform or the new unified alerting platform that debuted in v8 and became the default in v9?

Using v8.4.4 without unified alerting