Amber is an opportunist breh. She would not call this out if she was actively benefiting from white feminist, she's not the type to go against the grain unless it's lucrative (I.E. slutwalks).
If she's calling out white feminist it's because she needs opportunities from black women because the ones from white feminist dried up. You ain't seen Amber on anything major recently.
Tariq already called this shyt a few years ago. They will use her to do their bidding and toss her to the side when they are done and that's whats happening now hence this IG post hence her running back to the black community