I found the following users who may fit your language exchange criteria:

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/first_tumbleweed8760	2022-02-09	Post	`8`	Korean, Chinese	English
u/coralinthemarine	2022-02-09	Post	`8`	Korean, Chinese	English
u/samoyedwitch	2022-03-08	Post	`8`	Japanese, Chinese (Native)	English
u/yokoskytree	2022-03-09	Post	`8`	Japanese, Chinese	English
u/mrshm_huang	2022-03-20	Post	`8`	Japanese, Chinese	English

Please feel free to comment on the above posts to get in contact with their authors.