Hello,
**** at this site: https://***.psychotherapie-fluechtlinge-berlin.de/kontakt/
Search for the word "arabisch" (without the quotes). You'll find psychologists who know arabic.
Another source: Try this: https://***.kvberlin.de/60arztsuche/esuchep.php
Got to form field 'Sprache' and choose "Arabisch"
Good luck, Jan