Microsoft Purview, Configure cloud settings for use with Compliance Manager Compliance Manager integrates with Microsoft Defender for Cloud to provide multicloud support.
Organizations must have at least one subscription within Microsoft Azure and then enable Defender for Cloud so that Compliance Manager can receive the necessary signals to monitor your cloud services. Once you have Defender for Cloud, you need to assign the relevant industry and regulatory standards to your subscriptions.
View available environments
1. In Defender for Cloud, select Environment settings on the left navigation.
2. View the available environments and subscriptions currently visible to MDC for your tenant.
You may need to expand your management groups to view subscriptions, which you can do by selecting Expand all below the search bar. In addition to your Azure subscriptions, you'll also see any Google Cloud Platform (GCP) projects or Amazon Web Services (AWS) accounts connected to Defender for Cloud.
Reference:
https://learn.microsoft.com/en-us/purview/compliance-manager-cloud-settings