Do you want to get notified when something wrong with PowerApps and CDS happened?
I am afraid that currently it is not possible to get such a notification when a service incident occurs on PowerApps and CDS. If you need this feature, please feel free post your request on PowerApps Ideas Fourm:
Yes. I would like to get notificed when PowerApps/CDS experiences a service incident.
Do you know if there is a location where they post the status of service incidents?
Do they post them here, https://powerapps.microsoft.com/en-us/support/?