Alerting: single alert rule to multiple notification policies

Grafana 9.0.4 installed.
Using Grafana Alertmanager
Relatively need in Grafana
I have a single Alert rule I want to apply on multiple Notification policies:
e.g. a Prometheus alert on a disk -
I want to send the notification to two separate groups that relay on the disk.
Trying to set two different labels on the rule with two notification policies one set with each label didn’t send it to both.

Actually my question is more general - what is the AND OR relationship between Alert rules and Notification policies - I was having hard time to understand it from the documentation.

For example If I have an alert rule with two labels and two notification policies where each is matching one of the labels (name and value)- will Grafana execute the notification to both ?

Thanks
Please advise

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