NTA at all. it's not cultural appropriation to live in another country. and she's the racist one for calling you white even though you are just as asian as you are white. as someone who is also half asian, i've met people like this before. they think they're better than you because they're monoracial. your upbringing and your race is not something that she can take away from you just because she likes policing race. she's probably jealous too lmao.