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

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/abdirakhman	2025-05-31	Post	`10`	English, Russian	Persian, Dari
u/felixseletskiy	2025-03-11	Post	`6`	English (C1), Russian (Native)	---
u/need2process	2025-03-11	Post	`6`	English, Russian	---
u/working-reserve-4746	2025-03-13	Post	`6`	English, Russian	---
u/overall-figure4866	2025-03-14	Post	`6`	English (B2), Russian	---

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