OPPO has made its latest OS skin official. It is based on Android 12, yet exhibits a considerably re-upholstered new UI rather than Google's new Material You design. It has also announced a roadmap that outlines which smartphones are eligible for the upgrade and the approximate date of upgrade per device.
https://www.notebookcheck.net/OPPO-unveils-ColorOS-12-detailing-which-devices-will-get-it-and-when.562352.0.html