Google has started the Android 11 beta program. This initial preview ROM should contain changes such as notification bubbles, enhanced permission controls and wireless ADB debugging. It is compatible with newer Pixel-series devices, although other OEMs have announced some of their phones will also get this beta soon.
https://www.notebookcheck.net/Google-releases-the-first-public-Android-11-beta-for-most-Pixel-phones.470147.0.html