It’ll always be a tricky part. I live in Asia, nobody can physically tell the difference between Korean and Japanese. My wife is Chinese and when in Japan got approached as a local by every one she met. It was quite amusing as our host, her cousin who’s dad is a white guy from Seattle, was ignored and then piled in with perfect Japanese.
So at that point you are looking at cultural differences really. It’s like a Brit playing Superman or Spider-Man or the wonder of Highlander when a Scot plays a Spaniard and a Frenchman plays a Scot.
As we saw with Chloe Bennett mixed race elements confuse it even more. My kids are half Chinese, they don’t look very Chinese, just a bit if someone tells you, similarly to Chloe.
I’m against whitewashing any characters but there’s also a point where the pursuit for the exact racial purity of actor stinks a little of the kind of worst thing we should rail against.