OnePlus 7 series and OnePlus 7T are getting another OxygenOS update in October that majorly fixes some bugs and keeps the same September security patch. The OnePlus 7 series includes the OnePlus 7 and the OnePlus 7 Pro while the OnePlus 7T series includes, you guessed it, the OnePlus 7T and the OnePlus 7T Pro. The OnePlus 7 series and the OnePlus 7T get update version 10.3.6 with pretty much the same changelog as the previous update for the Indian variant, and slight changes for the EU variant. There is no information for the same update for the OnePlus 7T Pro.
As per the OnePlus 7 series and OnePlus 7T forum posts (7 series, 7T), the OxygenOS update comes with version 10.3.6 for the Indian variant and version 10.0.9 for European variants. For the OnePlus 7 series, there is no change in this update compared to the