The CRT term for that is “white adjacent”, which can mean either “white passing” or “acting white”.You’re half right. I’ve gotten it from both Black and White people.
White adjacent is obviously a pejorative term. A white adjacent person supports systemic racism. White adjacent is usually used against asians as “white passing”, for enjoying the automatic benefits of whiteness. But white adjacent is also used against people of color for “acting white”, thereby making an ally of whiteness.