It seems to be, according to media sources, that it's all going to be covered. All the phones HMD has made will be getting Android 9.
It's a dual-camera mid-ranger more powerful than the Nokia 5.1, though it has a larger, less resolution-dense display. We're still waiting for more.
The Nokia 5.1 Plus would stretch the display of the Nokia 5.1 just a little bit while also bringing an extra camera to the back side.