The China exclusive Nokia 7 is now receiving an OTA update which brings the Android security patches for August 2018. The update is tiny, weighing only 97MB and updates the security patch to August 2018. There’s nothing else mentioned in the change-log. The post update software version is 224F.B01.
The Nokia 7 is not an Android One certified device. It is also not among the Nokia phones which run vanilla Android. The China ROM has a number of enhancements and that doesn’t stop Nokia from regularly updating the phones in China. This is Nokia’s indirect answer to the people who feel that adding customization to Android code results in slower updates. It is more about the willingness and dedication.
If you are using a Nokia 7 in China or outside of China, then you can head to device settings to manually check for updates.