It seems a stable release of Android 10 has started arriving on Pocophone F1 smartphones around the world. Xiaomi had some issues with the software a few weeks ago, with numerous bugs preventing a wider rollout of the latest OS. However, it appears that even Pocophone F1 owners who did not sign up for the beta test have now started receiving the welcome update.
https://www.notebookcheck.net/Pocophone-F1-Android-10-update-starts-rolling-out-to-the-wider-public.456069.0.html