Hello, Marcel Hardter.
Thank you for contacting Microsoft Community.
Based on your inquiry, we understand you are unable to see your Azure Virtual Desktop Specialty Certificate on your Learn Profile.
To provide you with further assistance, we have opened a Private Message where we have requested information related to your Learn Profile to verify it and assist you accordingly.
You can access with the following link:
Initiate Private Message
We are looking forward to your information. If no response is received within two business days, we will proceed to close and lock this case as well as the Private Message.
Best regards,