Woah I love this art! When was this official art shown off if I may ask?
I'm pretty sure this is fanart, I can't find it anywhere on any official source. This only really appears on news websites (and they give 0 credit on any of them), but not on mihoyo's forums nor on their twitter. Here's the original artist's tweet: https://twitter.com/liyue_so_good/status/1433380123714076677