Hello, Nelson.
We appreciate your response over Private Message with the requested information. We have check your credentials in our system.
As you have approved the MS-100 but you cannot visualize the MS-100 Certification in Your Dashboard.
If you have accomplished a Learning Path to get a Certification, you will see it under this space in Your Dashboard. However, if you have approved Exams associated with the title, your results will be visible under Transcript.
The MS-100: Microsoft 365 Identity and Services, is part of a Learning Path to achieve the Microsoft 365 Certified: Enterprise Administrator Expert - Learn | Microsoft Docs. To accomplish this title, you must complete the next prerequisites:

Once you have accomplished the requisites, you will get the Certification.
If the MS-100 is not visible under Transcript yet, we need to rule out system related issues. Please follow the steps below:
1. Use InPrivate browsing in Microsoft Edge.
2. Clear browsing history, cookies and cached data.
3. Click on this link to go to Your Dashboard.
4. Select View Transcript.
We would like to confirm the outcome. Please let us know if it works and if there is anything else we can assist you with.
If this solves your problem, please indicate “Yes” to the question and the thread will automatically be closed and locked. In case we do not receive a response, the thread will be closed and locked after one business days.
Best regards,