Nikon / RED have recently released an update to their SDK which enables N-Raw decoding in other apps. So other developers can now more easily incorporate N-Raw decoding (sorry about the terminology, it’s not my area of expertise). News is that Adobe are going to incorporate N-Raw decoding into Premiere this year. So now would be the time to add one’s voice to this for FCP. I’ll do that myself as well although I actually prefer to grade in Resolve for its superior grading tools and edit in FCP. That said, it would be good to have the option to do it all in FCP.
The latest beta version of the free REDCINE app (link below) can now decode N-Raw and export as ProRes for import into FCP so that is a good alternative to Resolve right now and it gives good results. It’s a bit slower than Resolve but has a couple of advantages: it exposes a lot more metadata and you can export in 8K (not possible for the free version of Resolve).
https://www.red.com/download/redcine-x-pro-mac-beta