Pop a notification into a bubble? (Android 17 feature)

Imagine you get an email and you could, through a button or gesture, turn the notification into a bubble (android 17 beta 3 feature), such that you have the email app opened as a floating window and you can do whatever without sending the app you were in to the background. Is there such a feature? searched a bit and didn't find anything. Also would be nice to have multiple instances of an app