Now don't get me wrong, I am 100% on board with the idea of gender and sex being different things and that gender is primarily a social construct as its per formative not characteristic.
HOWEVER, I have recently undergone a Diversity training course in work where we were informed that "there are more than two sexes" and that people are often born as "a woman in a mans body" and vice versa and that there are numerous different variations. I get that can be true from a gender role perspective, but when this point was raised we were told no, its a biological reality as well. Apparently this is due to extra XX and XY chromosomes being present in some people in configurations such as XXY, XXX etc.
Now my issue here is that configuration of chromosomes is only a characteristic of sex in mammals (and not even all mammals at that). It seems we are redefining an entire classification system used in a huge area of natural science on the basis of what exactly?
If it was really true that there are "more than two sexes", surely this is something that biologist would have identified years ago?