During WWDC 2019, Apple announced that it will bring live radio stations from several online providers to users on the iPhone, iPad, and HomePod. Apple said that it will be sourcing from online providers such as Radio.com, TuneIn, and iHeartRadio.
For example, asking your HomePod to “Play radio station BBC Radio One.” Siri’s response: “Playing BBC Radio One, provided by TuneIn.”
The Siri live radio feature is already starting to work for some users who are running iOS 13 on the iPhone, iPad, and HomePod.