You're welcome!
Oh, I have seen the tv show sequel, and it was pretty fun. at least the first season. But it focuses on the group of friends that the guy and girl left behind when they left at the end of the movie. The two of them aren't in the show (and aren't mentioned, either, if I remember correctly).
Hm, maybe there is no imitation in the US simply because it would be too "obvious"? Of course it has been a while since YA aired and it was cancelled early on, but lots of people seem to remember "the WB show where that girl dressed up as a guy". I'm not sure about Asia, but I'm pretty sure that YA is not widely known in Germany. So maybe it's easier to produce imitations of the story here where the original isn't really known to the audience...