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

Username	Date	Post Link	Relevance	Offered Matches	Sought Matches
u/justseekingfreedom	2020-10-29	Post	`7`	German (Native)	Arabic, English
u/aqua2112	2020-09-25	Post	`5`	German (B2)	English
u/notsurprised02	2020-10-19	Post	`5`	German (Native)	English
u/justahumanbonsai	2020-09-26	Post	`5`	German (Native)	English
u/ilikeeeblue	2020-10-24	Post	`5`	German (Native)	English

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