I have a Raspberry at home which displays some information such as time, temperature, date etc. Some time ago I coded a script to display the music I listen to on Spotify in real time.
I have a little more information to give you. I use Trakt to scrobble my Plex. But for the display on the LCD screen, I simply read the Trakt information via the API. So we don’t care if it’s Plex or not.
For podcasts, we could do the same thing easily I think. I don’t have an iPhone so I can’t do it myself but if you’re interested, we can easily solve the problem you and me