From now on, the YouTube Music app will be pre-installed on Android 9 and Android 10 devices.
It looks like Google is putting another nail in the coffin of Google Music Play as it stops having it preinstalled on Android devices and puts YouTube Music in its place.
In May at 2018, Google had announced YouTube Music. At that time, this application came with two "flavors": the free version that contains ads and the paid version called YouTube Music Premium. The free version lives and reigns and it seems that the manufacturer is promoting it further.
So this app is going to replace the Google Music Play app. Google announced the transition in an article on the official YouTube blog.
Google Music Play and YouTube Music are currently pre-installed you can install it manually from the Play Store. But soon the opposite will happen.
If you've been to YouTube recently, you'll see ads for YouTube Music. Google is strongly promoting YouTube Music, so expect the change very soon. We're not sure what prevents Google from completely removing Google Music Play, as it doesn't have much traffic. However, this decision of the company leads there.