No idea about the streaming apps via phone. Are you using android auto or just streaming to the car? It could be something those apps have setup when streaming to another device, similar to how they block YouTube from playing on the infotainment screen
All I can suggest is try different apps, try just sending the audio to the car or using android auto whichever way round you haven’t tried it.
There’s some great Enyaq owners on YouTube that show how to get the best range from the car without being silly.
I always charge to 100% can’t be bothered mucking around and I give zero poops about the long term battery health once I’m done with it, maybe I should but I only have a certain amount of stuff to care about lol.