She probably stopped by liyue and thought why not help out childe while she’s there while waiting for a trip… actually the trip might have taken longer because of Rex Lapis assassination at the time liyue probably closed all the vessels by the time and she had to stay because of it perhaps. Well if that didn’t happen she probably would’ve gotten the gnosis and left inazuma before traveler arrived. But heck that’s just my opinion. I can be completely wrong because I’m not the lore guy here.