This is an interesting topic, as well as being a disappointing one. I recently bought an Echo Show, whilst additionally using various Google Home/Nest devices for the last several years. I too was disappointed that the RP skill does not give any song info or album art when playing on the Show, although I fully accept this is a complication caused at the Alexa end, not RP's. What I find curious is that when I check the Alexa app on my Android phone while RP is playing on the Show, the app does show the track title.

I guess I'll have to resort to using TuneIn again, just as with the Google devices, if I don't want to stream via Bluetooth. That's a shame though, as TuneIn can be annoying with its ads and idents. It's a compromise though, and I get it.

Does anyone know what happened to the Alexa skills or routines that allowed the playing of the other channels? Not only is the "Alexa, ask Radio Paradise what's playing" no longer working - which isn't a problem, because TuneIn shows it now (fabulous!) - but no skills or routines work any more, other than getting Alexa to play the Main Mix (Live). For many months I was able to toggle to My Favorites whenever I pleased, but the ability disappeared a couple weeks ago. I was also able to skip - play the next song - but can't do that anymore. Help!

Due to limitations with the Alexa service we can't update the info on track changes.
Best we could do for the devices with screens is display a generic image and the channel info.

This is also why "Alexa,  what's playing"  won't give an answer.   To get the current song info you need to include the skill name.
"Alexa,  ask Radio Paradise what's playing"