OnePlus 8 and OnePlus 8 Pro owners now have a new Android 11-based custom ROM to utilize if they are not fully content with the well-received OxygenOS skin or simply want more freedom to tinker with their phone. While Paranoid Android Ruby Alpha 1 can be utilized on the OnePlus 8 and 8 Pro, it is not compatible with the OnePlus 8T.
https://www.notebookcheck.net/OnePlus-8-and-OnePlus-8-Pro-get-Android-11-based-Paranoid-Android-Ruby-Alpha-1-custom-ROM-treatment.506220.0.html