If you ask why the SoC is important when talking about the updates, the answer is that the silicon provider also has a part to play in the update process. Nokia Mobile shared an inforgraphic in January of this year, showing that one of the first steps to update the device is to get the chipset vendor to support the new OS. That’s also sometimes the reason why some devices get the update before others.
The camera flagship Nokia 9 PureView is scheduled to get Android 10 sometime in Q4 2019, so by the end of the year. The official Instagram account of Nokia Mobile narrowed the release window to early December, in a response to an inquiry our reader Jason made (thanks for the screenshot :)).
We have to take the information from Nokia Mobile social accounts and support with a grain of salt regarding the questions about updates and features. I’m sure as we get closer to the end of the year, an exact start date of Android 10 release for Nokia 9 will be announced.