Google introduced “bubbles” with Android Q Beta 2, which are essentially system level messages that appear in a messenger-style chat head. Although these do not replace the OS’s traditional notifications, they can be activated by a switch in the settings. However, the company announced that it wants to move this switch to the development option menu in the final version, making it harder to accommodate most users.
Google’s decision to hide the new functionality may be because it doesn’t “work well with all apps yet. When we originally covered them, we were actually pretty frustrated about how they behaved for non-messaging software. not fully Hangouts and messages, which may mean Google makes bubbles available through a hidden setting for those who want to give it an early try but are waiting for more developers to integrate the feature into their apps to make it more accessible.