Yes and so was Harris. I mean, prior to selecting Harris, Biden literally said he wanted a woman of color as his VP. If harris picks a white man as a running mate, that will likely be a diversity hire as well (although hopefully she doesn't say she wants a white man as a running mate out loud so she at least has plausible deniability).
I'm not saying she's unqualified, her credentials are plenty good enough for the job and much better than Trump or Vance. Its also not necessarily a bad thing to intentionally pick a running mate with a different upbringing than you, so you get exposed to different world views. But it's not racist to say she's a diversity hire when Biden literally said as much.
Slicing the Americas in half is brutal, took me a minute to figure that out