Even if you think race and sex is relevant, the implication, which people make again and again, that if voters don't like her it's down to her sex, is bollocks. The same as it was with Hilary. Massive campaign fails, a historic inability to connect on a personal level, an identification with Wall Street bankers, and I think also a sense of entitlement, are what lost Hilary the presidency. She is still going on about it being because she is a woman. Bullshit.
There are many many successful female political figures in the US. And many many black ones. There has been a black president. I think the insistence on seeing those as the main issues likely to determine the fate of a candidate is reductive and unrealistic.
I suspect that gender issues may play with moderate Americans more than abortion. Trump has played that in quite a canny way and very much left it aside since the court decision - he's made it clear that he sees this as a state issue, and that pro-life and pro-choice campaigners should be working at the state level to see the kinds of laws they want. It makes it difficult for the pro-choice lobby to pin him down, especially because their constitutional argument has always been weak. Whether voters are women are men is pretty irrelevant on this issue, in the US women are a little more likely to be pro-life than men are - the feminist claim that they represent the views of American women on this, in my experience, actually turns off a lot of women who feel their views are being co-opted, or that it implies "real women" all think one way.
I have no doubt that gender ideology I'll be a hard issue for Harris to do anything with. She is, as another poster indicated, very much associated with identity politics, and they are imploding in the US. I don't see her getting as much of the black vote as Obama either because of that, black Americans tend to be more conservative. Obama was seen as a very moderate Democrat, whether or not that's fair, and Harris is not.