PuzzledObserver, I’m afraid you too have fallen for TRA propaganda (Wikipedia is noted for being captured by TRAs).
As others have said, there are in fact only two sexes, and everyone falls into one of them, even if they have a DSD/VSD. It’s somewhat dehumanising to suggest otherwise and many campaigners on this issue have asked for that to be respected.
And as others have also said, this has precisely nothing to do with gender ideology. It is used as an obfuscatory mechanism to try and hide the clear fact that one sex class has dominated, controlled and abused the other sex class throughout history and throughout cultures.
The clear fact that only one class of people can impregnate and only one class can become pregnant (whether they actually do or not), and that the members of one sex can, generally speaking, overpower the members of the other sex if they so choose - and so there are different risks for the two sexes, different outcomes altogether in the case of unprotected heterosexual sex.
And that it is consequently important to accurately name and recognise those two sex classes, and who belongs to each one.
Particularly important for feminism: if we can’t name our oppressors, or identify the reality on which our oppression is based, how can we fight it?