Detections are listed in the Windows Security app on the Protection history page.
If you’ve secured your Windows 10 devices and enrolled them in Intune, and your organization has 800 or fewer devices enrolled, you’ll see threat detections and insights in the Microsoft 365 admin center on the Threats and antivirus page, which you can access from the Microsoft Defender Antivirus card on the Home page (or from the navigation pane by selecting Health > Threats & antivirus).
If your organization has more than 800 devices enrolled in Intune, you’ll be prompted to view threat detections and insights from Microsoft Endpoint Manager instead of from the Threats and antivirus page.