Sideload Launcher is a third-party launcher app and is one of the essential Android TV apps you’ll want to install.
Description: Sideload Launcher
This is only for the new Android TV boxes / devices, that wont place apps other than google Varified app on to the desktop.
Android TV requires existing apps to be updated and declare themselves compatible before they’re installable from the Play store.
While certainly not as streamlined or seamless as the average user would wish for their TV, many apps can still function on some level on these devices if you sideload them, but they don’t show up in the Leanback Launcher (the Android TV homescreen).