To Trim’s original question, there is at least some scholarship on the idea of being “transracial.”
Still far less accepted (and much rarer) than transgender identification.
https://newyork.cbslocal.com/2015/06/12/nyu-professor-naacp-rachel-dolezal/
But NYU sociology professor Ann Morning told CBS2’s Jiang that just like some people are transgender, others may be trans-racial – identifying more with a race other than their own.
Dolezal grew up with four adopted black siblings, and was briefly married to a black man.
“We’re getting more and more used to the idea that people’s racial affiliation and identity and sense of belonging can change, or can vary, with different circumstances,” Morning said.
Where's the "scholarship," it certainly isn't in that quote or article, that's a simple opinion, that's parsed with "may be."
Look at Dolezal's answers to the questions there, she's cagey because she doesn't have actual answers, while we don't understand "I've always felt like I was a boy" it is in fact an answer.
"Julia, you have indicated you're a female but we've found you were born a male named Jerry, can you explain that."
"What? I don't understand the question. I don't acknowledge the term female, I'm a chick"