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

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/due_spirit_1022	2022-01-08	Post	`5`	German (C1)	Spanish
u/next-door-nerd	2022-03-07	Post	`5`	German	Spanish
u/present-mood-3165	2022-03-27	Post	`5`	German (Native)	Spanish
u/nikolisko	2022-03-07	Post	`5`	German	Spanish
u/upzylon	2022-01-14	Post	`5`	German (Native)	Spanish

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