It's not going to be her wake up call. She's not doing the Tiger Woods "I'm kinda sorta black" routine. The wake up call will be the next 4 years of white America treating her like they treated Michelle Obama and Maxine Waters. But that bell will only go off if the people who argue that she isn't black stops talking long enough to listen.
I think it is politically self defeating for black people to alienate themselves from people who are in prime position to serve them. This "you can't sit with us" activity is one reason why we remain stagnant. Regardless of whether you feel she's black or not, she says she is and there are a ton of politically active and educated black people who do.
What if 4 years from now, the only thing you can say is that you are exactly where you are now... maybe worse off... and Kamala says she couldn't get much done for black people because black people were too busy convincing the world that she isn't black instead of holding her and the Biden administration accountable? Nobody wants a repeat of Obama, but black people have to learn what political accountability looks like. For some reason, we never want to hold government officials accountable, only either worship them blindly or demonize them entirely.