You’re equating “Asian” with “Chinese.” Asia also includes Japan, Korea, Thailand, India, Vietnam, etc., each with its own cuisine (or cuisines) and cooking styles. Chinese/Japanese and Chinese/Japanese/Thai fusion restaurants have been around for a while. Though I’ve yet to try it, Chinese/Indian Asian fusion restaurants are becoming popular in my area. Apparently, traditional Chinese dishes cooked Indian style are quite different from what I’m used to, or so I’ve been told.
I once drove past a restaurant that billed itself as “Japanese/Italian fusion.” That got me very curious, but the next time I drove through that area, it was gone.