Multiple Audio Sources Playing Through The iPhone Media Center

How is it 2024 and Apple hasn't given us the option to play multiple Audio Sources through the iPhone? (e.g. Youtube playing in the background and YoutubeTV playing simultaneously). For those of us sports writers and commentators sometimes we need to listen to a Livestream about the content we're watching while also watching the sporting event we need to write about. This is something every other operating system has been able to do for years but us Apple users have to use multiple devices. Shameful really. Let's find a way to figure this out. Whether it be an app or a setting added directly into iOS.