Aggregation in Dynatrace Alerts within Grafana

I have installed Dynatrace in Grafana and created an alert. However, the problem with the alert is that I have no option to force the aggregation to 15 minutes, as I can do in the display where I can set a time step such as 15 minutes, 30 minutes, or 1 hour. Unfortunately, this method doesn’t seem to work with the alert rule.
Grafana version : Grafana v10.4.0
Plugin Dyntrace version: 3.9.1