OPPO has announced new beta programs to help bring the latest version of Color OS (based on Android 10) to some of its 2018 phones. These are the flagship Find X, the R17 and its Pro variant. Places in these programs are available to users in certain regions only, however.
https://www.notebookcheck.net/OPPO-announces-an-Android-10-beta-program-for-the-Find-X-and-R17-series.454363.0.html