I searched pubmed and I’m pretty sure this is anecdotal, unfortunately. Hard to say how much of the volume of non-straight/trans and trans/trans twins on social media is selection bias since the trans/cishet twins aren’t eye-catching. There seem to be a lot but gosh do folks love to hear about twin similarities. It’s worth noting most are fraternal but that’s consistent with the general population.

I understand where Kamirose is coming from, but it’s not empirical (unless there’s a study that used some really weird terminology and I missed it).

Edit: I found a review and its citations do not converge well due to small sample sizes (hard with trans + twins - two rare things for births).