I've been casting the app from my Samsung phone. I don't think it sends the fancy audio, but I only use the sound bar and a subwoofer so looks and sounds pretty good.

I didn't realize I could cast everything from android. Do you do that with chromecast or need a different streaming app?

Anybody else who was successful in installing the disney+ app on their eclipse?

I *think* Chromecast just casts audio to the sound center.  I could be wrong, but this is what seems to happen whenever I try it.

To cast video to the Eclipse, I start the Disney+ app, then I go in the "screen share" application on the LG, then pull down twice on my phone's screen to get the expanded control panel/shortcuts.  Click on the "media" tab, and it should show the Disney+ app and the select the "smart view" icon and it should allow you to select the LG as the target.  You may need to start playing the media within the app first.  I've done this with the HBOMax app as well.  It seems to be built in to my Samsung phone.

It looks like Samsung has published both an iPhone and Android app so it doesn't seem to be limited to a Samsung phone.  However, it will probably be a different setup process (if you can even follow the one I typed above).