Hi..@Sammak123,
I am also in the same situation and submitted a covering letter thru webform explaining that a police clearance certificate is not required for non-citizens who does not have legal residence status and not residing in Saudi Arabia. Moreover, I received the acknowledgement receipt of the document by IRCC but the status tracker is still showing send us additional information "waiting on you" status for about two months now.
So, could you kindly share your experience with what supporting documents you supplied to overcome the police clearance certificate from Saudi Arabia and whether it got accepted by IRCC without any additional document requirements. Did you face any delays in background verification? Was you able to complete all the steps of citizenship such as Background check, oath, etc?