Hello, yes, this started this weekend for me. I also found that exiting the app on Apple TV signed me out elsewhere. To reverse out of You Tube on Apple TV I use TV/Control Centre button.
So the ABC list on Apple Music is awesome: All ABC capital city stations RN ABC News Grandstand ABC classic and classic 2 Triple J Triple J Unearthed Double J Jazz Country
And they come up on Apple Watch radio meaning you can leave the house without the iPhone.