How to make Defender for cloud workflow automation gets alerts or vulnerability from all subscription and send automatic emails?

Question

I'm trying to achieve sending an automatic email in case of any vulnerability detected by Defender for Cloud using its "workflow automation".

I referred to this: https://learn.microsoft.com/en-us/azure/defender-for-cloud/workflow-automation to build the workflow automation. Which is not working as expected. I have a few questions:

1. Is Defender for Cloud can be used for vulnerability detection? or should I use other Defender suites? If other suites, what is that?
2. How do I know if my workflow automation ran successfully or not?
3. From the logic app "activity log", I see "Operation name" > "List Trigger callback URL" status "Succeeded". However, when I see "Development tools" -> "run history," there is no status logged. How is it possible? When the activity log says success, and there is no run history?
4. How can I make sure that the workflow I'm creating ( in one of the subscriptions) can provide me all the vulnerabilities from the entire Azure resources/subscriptions?
5. How can this vulnerability scanning be extended to other cloud provider assets/resources?

It would be really appreciated if I can get the answers for my above questions. Thanks.