iPhone: Could Apple program it so that music and a Twitch stream run simultaneously?

I've always hated the fact that you can't run two things at once. I can't imagine Apple not being able to program it to work.

It works on my PC, of ​​course. Usually, when I'm watching a Twitch stream, I also turn on music that plays quietly in the background. It's a shame that this doesn't work on my phone. I'd like to be able to listen to an interview/podcast on the YouTube app, for example, and have background music at the same time.