I believe my MacBook is the 2015 model. The N key doesn’t work anymore. Is it possible to get the whole thing replaced or do I have to buy a keyboard to use separately? I’d prefer to just replace the keyboard. I saw one keyboard on the Apple site that says 2015-2018. Should that one work?

rossmanngroup.com/keyboard-2

you can order one and do it yourself also but Id watch a youtube of the exact model you have being repaired before you buy it so you have an idea of what your getting yourself into