The app was released in November 2020 few months after CCwGTV was announced and from the package name the letter x in "com.google.android.apps.tv.dream x " might indicate that it is for Google TV device similar to Google TV Home app package name "com.google.android.apps.tv.launcher x ".
Other than that, the icon of the app is similar to
Backdrop Daydream
app:
Backdrop Daydream -
https://i.imgur.com/OXtSyHG.png
Android TV Ambient Mode -
https://i.imgur.com/XAM6TJy.png
If Google TV devices does not have Backdrop Daydream app pre-installed then it might have been replaced with Android TV Ambient Mode app.
Manage to installed in on Android TV 9 device. It does work like normal Backdrop app but not possible to configure the app with Google Home app and the screensaver is without the 'Chromecast Built-In' watermark...lol
My ChromeCast with Google TV has it installed. my two Onn UHD boxes do not have the ability to install it. So it appears it is similar to Pixel Launcher in that it is only available for particular Google devices.
Just tested it seems to work fine on my gtv. https://apkcombo.com/android-tv-ambient-mode/com.google.android.apps.tv.dreamx/download/apk
Not available for my MiBox 3 running Android TV 9, which is what the app says that it needs to run.
It might be something that only works on a Google TV and not on other Android TV devices.
I believe this is only for the new Chromecast with Google TV.
It's on my Chromecast ultra
I've installed the APK manually android TV 9 but can't customise so just default pictures :)
Fire stick… check out my tread r/ambientlightapp
It works in my own TV too. I'm loving it.
None for me
Google TV devices.
At least it's working in my CCwGTV.