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

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/throwawayvoiceinwind	2024-07-25	Post	`5`	English (Native)	Portuguese
u/budget-ad-5431	2024-08-02	Post	`5`	English	Portuguese
u/isle11	2024-08-08	Post	`5`	English	Portuguese
u/ok_plane6954	2024-08-11	Post	`5`	English (Native)	Portuguese
u/southern-survey6140	2024-08-26	Post	`5`	English	Portuguese

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