OnePlus is carrying out another product update to the OnePlus 6 and the OnePlus 6T. The OxygenOS 10.3.11 update brings along the May 2021 Android security fix, bug fixes and improved framework stability.
The update is carrying out in clusters, thus it will be gotten by a predetermined number of clients at first. The OTA will have a more extensive rollout in a couple of days if there are no basic bugs, OnePlus said in a post on the local area forums.
If you haven't got the update warning yet, you can check it physically under the telephone's Settings > System > System Update.