Trusted informant SaveYourPrimos on his Twitter page said that at the moment, only the banners of three characters in patch 3.4 for Genshin Impact are known for sure. We are talking about Hu Tao (Pyro; spear), al-Haytama (Dendro; one-handed sword) and 4-star Yao Yao (Dendro; spear).
He also asked players waiting for Ayaka, Ye Lan, Shen He, and Xiao to rerun in Patch 3.4 to wait for more reliable leaks before skipping Patch 3.3 or, conversely, wasting all of their Source Stones on it. At the same time, the insider noted that he does not exclude the appearance of these characters in banners, since now everything is possible.
Note that version 3.4 will be released on January 18 next year. As a result, about half a year has passed since the last reruns of Xiao and Ye Lan. On the other hand, Shen He could be played for the last time at the beginning of this year, and Ayaka in May. Recent leaks point to the banners of Ye Lan and Shen He.