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

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/pk0rion	2021-07-12	Post	`8`	English, Korean	Chinese
u/byjnes	2021-08-15	Post	`8`	English, Korean	Chinese
u/wendyh_0406	2021-05-25	Post	`6`	English, Korean (Native)	---
u/ovulatingscrotum	2021-05-26	Post	`6`	English, Korean	---
u/godspec9	2021-06-08	Post	`6`	English, Korean (Native)	---

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