She seems like the type that would accuse such people of faking it to get special treatment, because they don't look "black" enough. The right-wing media in Australia were pushing that line for a while (and probably still are).
Now that is a complicated question. There is a "one drop" narrative that extreme supremacists have... but someone who doesn't look black claiming blackness would definitely get a side eye from a chunk of the black community where even lighter skinned black folks are made aware of the privileges of shade and tone...
So probably both yes and no or the principle of Mu depending on circumstance?
The real answer is it depends on what box they check when they fill out forms. Presuming they don't check the "choose not to answer" box. Then there's simply no way of knowing.
I agree! She could be big-boned and 17 for all I know. I certainly don't care. Also, no way she's the first, the others just couldn't talk about it because of people like you.