HMD Global is slowly but steadily releasing source codes for their remaining smartphones. After releasing the source code of Nokia 2, HMD Global has now released the source code of the Nokia 9 PureView as well.
The Open Source Releases page on the Nokia Mobile website was updated yesterday and we only see a single new entry. There are still a few devices left whose source codes are yet to be released and HMD Global will have to release them sooner or later to comply with the GPL and LGPL.
Source: Nokia Open Source Releases