Managed dervices graph endpoint does not return hardware details

When calling the Graph API
https://graph.microsoft.com/beta/deviceManagement/managedDevices?$filter=azureADDeviceId eq '{some intune id}'
I receive a result with the filed HardwareInformation, but the values are empty or 0.

I read that hardware information is only returned, if the id is called directly, but when calling the Graph API
https://graph.microsoft.com/beta/deviceManagement/managedDevices/{someintuneid}?$select=hardwareInformation
I receive a http status code 200, but an empty result.

Is this a bug or do I call the wrong endpoint? (also the v1.0 versions does not work)