Works beautifuly.
Thanks to @deepspacedave - he did the leg work.
I’m a total newbie ( a few weeks in) and am just barely starting to understand (automation, triggers, cards, etc.). I built a verrry basic dashboard and followed a similar path (Dave) and it works quite well.
I have a error message on the screensaver for weather in my zone but that’s for a future fix. I tried to understand and fix but gave up for now.
Aside from that it’s full screen, no return to home (Alexa show), has a screensaver.
You don’t need any side loading (which means less support & risk). It just works quite well.
(You get a fully functional streaming tv when you need it too… 
)