Niʻihau is not representative of the Native Hawaiʻian community at all.
I figured it wasn't as lopsided but still curious if GOP won here or if went Democrat. Pretty sure Trump did better amongst Native Hawaiians than he did overall in state. Guessing probably similar to Filipino community which appears Biden won, but Trump got north of 40%. It seems Japanese the most heavily Democrat ethnic group in Hawaii while whites pretty close to overall average.
The Filipino community is quite religious, so I would expect them to be more Republican. I think a substantial percentage of Native Hawaiians are Mormon (centered around Laie, where BYU has a campus), so that is likely to have a significant effect as well.