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

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/blackforestmount	2024-06-11	Post	`5`	English	Portuguese
u/ihatedrivingincars	2024-05-24	Post	`5`	English (Native)	Portuguese
u/adventurous-till-850	2024-05-15	Post	`5`	English	Portuguese
u/magianegra888	2024-07-05	Post	`5`	English	Portuguese
u/k1nd_0f_s1ck_0f_l1f3	2024-04-15	Post	`5`	English	Portuguese

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