
So a while ago I was looking into Rhinedottir's attacks that led to the Cataclysm. We know that she hit Mondstadt at probably 2 points. Out at sea she created Durin who was eventually stopped by Venti and Dvalin on Dragonspine. Meanwhile at Musk Reef she may have been the one to set up the Spiral Abyss as a base of operations to continue the fight into Mondstadt. And a large number of her forces also struck Inazuma. This attack was as far as we know far worse because Inazuma was almost destroyed. The then Shogun Makoto sacrificed herself by directly assaulting Khaenri'ah but it was all in an attempt to create a time loop with help from Istaroth to create the Sacred Sakura that could absorb the Abyssal Energy out of Inazuma and give Ei a fighting chance.
We didn't really hear much about Khaenri'ah or the Abyss in Liyue and Zhongli talked more about the even earlier Archon War and preceding chaotic period. So I guessed the reason Liyue didn't really notice the Cataclysm was because of Guyun. In the last Lantern Rite we learned that Xiao patrols back and forth between Wangshu Inn and Guyun Stone Forest because these are the two gateways into Liyue. It stood to reason then that Khaenri'ah's forces were stopped in Guyun since their attacks on Mondstadt and Inazuma came from further east.

But actually they did manage a small attack on Liyue. In the Tenacity Set we were told that the Abyss attacked around the same time as Rhinedottir and the Millelith were sent to help the Electro Yaksha. Given the timeframe it should be the same force and there are Rifthounds down in the Chasm. But how did they even get there? Apparently they arrived on what the artifact calls "an iron meteorite."
Side note: This is going to be a stretch but in the new Vermillion Set we learn that when Morax was young the "sun chariot" fell from the sky and had to be repaired. Something else that was called the sun chariot was the Dainichi Mikoshi in Enkanomiya but that name is modern. The Dainichi Mikoshi was originally called the sun chariot Hyperion. Now if we go to Honkai (and a few sci-fi space series) then Hyperion is the name of their flagship vessel.
We know that Khaenri'ah had advanced technology. While Fontaine and Snezhnaya are likely Industrial Age and probably look steampunk-like Khaenri'ah was even more advanced so I wouldn't put it passed MiHoYo to give them an airship back at their prime.

It could be that while most of Rhinedottir's forces couldn't make landfall into Liyue at least this one battleship did. But it took heavy damage doing so and came down at the Chasm. The locals scrambled right away and were greeted by the returning Electro Yaksha probably noticing what was happening and picking his spot at redemption. Morax sends some Millelith his way and they eventually defeat the ship's surviving crew.
This attempted invasion would have made such a cool anime movie.

Tips and Tricks from a Super Casual Genshin f2p

