As a black woman, if you have to tell me You're not white, you probably look white ( at least in the US) and have all the privileges associated with it.

Also it depends on where you are too. Salma Hayek, for example, is considered a poc in the US, but she has clearly stated that where she comes from she is considered white ( whatever that means where she's from).

My Gen Z niece likes to use the term " Spicy White" for people she's not sure of.( I'm still not sure if that's a slur.)