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

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/biancatheb	2020-10-02	Post	`5`	English	Russian
u/israelinkete	2020-11-06	Post	`5`	English	Russian
u/thenaidenchop	2020-11-05	Post	`5`	English	Russian
u/tensuyu	2020-10-15	Post	`5`	English (Native)	Russian
u/eightcylindered	2020-10-23	Post	`5`	English (Native)	Russian

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