“DFAB” is kinda an outdated thing, like it was a useful term for a while but now it’s not applicable anymore (and never was, we just thought it was a good thing for a while) because it assumes too much. DFAB really doesn’t even tell you anything tbh and what it does assume is often incorrect for a large majourity of people. (In case you weren’t sure it stands for designated female at birth.) The only time that birth assignment is relevant is during discussions of transmisogyny and most people just say “I’m not a trans woman/transfeminine” to make things clear.
Whoever lists DFAB as an oppression is a transmisogynist since obviously they value birth assignment over self identification. People who list DFAB as an oppression are probably cis twerfs. DFAB isn’t an oppression. Being a girl, though, is. Cis girls are oppressed because they’re a girl but they have cis privilege. And obviously any other girl is oppressed by being a girl, people aren’t oppressed based off their birth assignment in this case.
On the other hand, DFAB or non trans women hold privilege by the fact that they aren’t trans women and/or don’t experience transmisogyny. Non trans women may not experience cis privilege but they still oppress trans women/transfeminine folks. (This is a good blog that goes into it more.)