| There's some debate over this. https://apnews.com/article/entertainment-cultures-race-and-e... > In some ways, the decision over “white” has been more ticklish. The National Association of Black Journalists and some Black scholars have said white should be capitalized, too. > CNN, Fox News and The San Diego Union-Tribune said they will give white the uppercase, noting it was consistent with Black, Asian, Latino and other ethnic groups. Fox cited NABJ’s advice. > CBS News said it would capitalize white, although not when referring to white supremacists, white nationalists or white privilege. |
I doubt this will pass the test of time, makes it seem like a noun ('a White'; it must be a noun to be a proper noun after all) rather than an adjective ('a black person') which (capitalisation aside) is way out of favour. (At least it is/would be in the UK, where 'PoC' isn't really used either, so ymmv.)