You can follow this: https://trainingsupport.microsoft.com/en-us/mcp/forum/all/how-to-download-your-certificate/0470972d-a6e6-4539-bf68-8ebe5abbc66b
Microsoft Certification is not currently supported here on QnA. They're actively answering questions in dedicated forums here: https://trainingsupport.microsoft.com/en-us/mcp/forum