The second beta of tvOS 11 has now been seeded to developers. This comes two weeks after the initial seed of the update. This update contains very little changes. We find the ability for the operating system to automatically change between light and dark mode, as well as home screen syncing.
To get this update developers can go to Settings and find it under System. If you’re not on the beta yet you’ll need to get the IPSW from the developer center.