I found this in a Nokia 7 Plus forum and it is working without any FC issues. However, front portrait is not working and rear camera colours are coming out weird. I am not sure what settings to use to correct it. I noticed some minor improvement in the front camera, which could probably be improved with the right settings.
If any of you can suggest the correct settings to get these working it will be great.
Anyway, since the rear stock camera is pretty good and even better than OP6 and also because the main rear camera (stock) has a 84 deg wide angle, we can always set the timer and turn it around to capture great selfies