OnePlus has released its Open Beta 6 software update for the 7 and 7 Pro. This version of OxygenOS confers the latest security patch levels on the 2 phones. It also introduces a setting to disable Zen Mode, as well as some fixes for the series' in-display fingerprint scanner.
https://www.notebookcheck.net/The-latest-OnePlus-7-and-7-Pro-official-betas-have-November-2019-security-patches.444012.0.html