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Hello @Atena Rezaei
Are you checking the correct user account (email) to login to Microsoft profile?
Try checking Score Report or Transcript for the same exam if you are able to see it.
If you are using correct user account, and you still can't find your certificate or are unable to view it, you can contact Microsoft Certification Support using link : https://www.aka.ms/credentialssupport, provide your Credential ID, and they will be able to help you further.
Detailed guidance on how to submit the request can be found here: https://learn.microsoft.com/en-us/credentials/support/help#how-to-submit-a-support-request
If this helped to guide you right way, please don't forget to click on "Accept Answer".