The new interface is not very friendly. I'm not able to add newly installed TV computers to my managed device groups. This is what I have from support, other than them sending articles:
You have only 03 ways of adding a device to your managed devices groups (Device Groups), one will be by managing the device manually in the general options of TeamViewer on the device, second, by creating a Roll out Set up that you will include in a Custom Host that you will install on the device or last, the third way if the device is already in your legacy groups you can migrate it using the migration tool in the Management Console.
TV, you are going backwards, in my opinion.
