https://wccftech.com/android-10-beta-now-available-for-the-oneplus-6-and-6t/

Based on an earlier OxygenOS update, it was evident that the OnePlus 6 and 6T would receive Android 10 before September ends. Three weeks into October, both devices have finally received Android 10 in the form of OxygenOS 10.0. Here's the full changelog according to OnePlus' website:

The changelog looks more or less identical to a stable version of Android 10 that made its way to the OnePlus 7 series earlier last month. Apart from the standard Android 10 features such as enhanced privacy options, new navigation gestures, and Smart Replies, there are some OxygenOS-specific improvements such as Game Space and Smart Display. Game Space lets you find all your games organised in one place. It also gives you access to options like Fnatic Mode and Graphic Optimization. It also has Digital Wellbeing integrated into it, allowing you to know the time spent on each game app.