Hi,
I assume you want to get notified on VMs that are stopped but not deallocated so you can see which VMs are generating running cost, but they should not. There is nothing by default about this available but Azure Resource Graph contains information for Azure resources thus Azure VMs as well. For Azure VMs it contains the information of the power State. You can build some custom automation in Azure Automation, Logic App or Function app that runs the Resource graph query once a day and sends the information somewhere in case such VMs are found.
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