That's bstc study that image is probably referring too is probably the Dick Swaab stuff from the 90s.

It was debunked by Ann Lawrence, who pointed out this area differentiates during puberty (therefore it can't be involved in childhood GD) and that illicit use of female hormones by transwomen (often contraceptive pills) was rampant at the time. So not seeing a history of hormone use on medical records was worthless and that's probably where the observed differences came from.

Having said that, I located three studies that demonstrate that you can tell what sex someone is from an MRI scan with about 95% accuracy even from incomplete data.

The ones you can't ID are gay.

There's a paper by Savic and Burke that corrects for sexual orientation in transgender subjects. What it finds are that if you correct for SO, the difference is only seen in one area reliably and it's not in an area that's sexually differentiated (the IFOF) but is abnormal in a lot of mental health conditions like OCD etc.

Transbians have normally masculinized brains. The intersex brain argument absolutely does not apply to them.