You can choose to scan the Team Drive data in your Security policy. 

Unlike other services, you must add the Team Drive service to the policy in the policy scope. As shown in the below figure, you must select the TeamDrive in the 'Whom the policy applies to?' section.

Once you click on Team Drive option, you can choose to either scan the whole Team Drive or scan specific Team Drive.

1. All Team Drives: This option will scan all the Team Drives for the member users present.

2. Specific Team Drives: You can choose this option to scan specific Team Drive folders for the member users present.

Note: When you add Team Drive folders to the policy scope, the Team Drive will be scanned for all the members of the Team Drive folder. The members of the Team Drive folder will be considered under the policy scope.