I find it interesting that they distinguish between fa'afafine and fa'afatama as descriptions of who fulfils this social role, with the former being male and the latter being female.

That doesn't really map onto the recent idea of 'non-binary', where one's sex is supposed to be entirely ignored, and the idea of someone being a 'non-binary man' or a 'non-binary woman' is generally considered wrong or even offensive to believers of this ideology.