Microsoft Defender for Endpoint is being adopted by SMBs at an extremely high rate now. It is integrated with M365 and is included with Business Premium licensing. All data is accessible via MS Graph.
The M365 inspector can discover it and the new inspector would collect data, including AV, firewall, and other policies intune related to the defender. It would return information on the devices and which devices are enrolled for Defender for endpoint and detailed information about detections and protection status of each device.