I googled a bit, my best bet is Canada.
Large population of the Chinese diaspora, so I don't feel too much like a minority (I am Chinese American).
The other choice is Australia.
EU is great, but since the UK isn't in EU anymore, I'd have to chose a non-English country, meaning, I'd have to learn another language. My brain can't handle that. Already have 3 spoken and 2 written languages stuck in my head (mostly dormant, haven't used some those languages for a while), I think my brain will explode if I try to learn more. Population of the Chinese diaspora is too small. So I'd also feel alone, because like... Imagine living in a place where nobody looks like you. Like a Black American kid in the deep south of the US and all your classmates are white, that's how it feels basically. As for the UK, I wouldn't need to learn another language, but UK just had a xenophobic riot in 2024, doesn't seem too friendly in my opinion. If the UK was in EU, I could just pack up and to go another EU country if Shit Hits the Fan, its what I like about the EU, options. But too bad UK isn't in EU...
There is also Singapore, which has like over 70% ethnic Chinese, and the official languages include English and Mandarin, which I already know.
Not technically "dream countries", but the most realistic countries that would be livable for me. Because I doubt I can speak Norweigian or Finnish. (Even tho I would love those countries)
TLDR: As a Chinese American, Canada as first choice, Australia as second place. Then probably Sinapore.
(Sorry if I'm rambling, can't express it coherently since ICE raids are on my mind)
Edit: I would probably also say Taiwan as an option, well... other than the fact that they are constantly on the verge of getting invaded, and I am not fond of the CCP.