Nokia Mobile updated their update tracker where users can see if a release of a particular update started for a particular device. The tracker functions on the principle that users picks their device in a dropdown menu and look for their software id, which can be found in the about section of the settings, and see what is the last update available.
The update tracker was updated on February 20th 2020 and going through the list I noticed that no single device received the February security update. Good things is that most devices are on the January update, at least for some models of a particular device.
I’m not sure where Nokia Mobile software team is located, but if they are mostly in China, maybe the recent Coronavirus outbreak caused delays in work.