MVA learning is not currently supported here on QnA. They're actively answering account linking question in dedicated forums here.
https://trainingsupport.microsoft.com/en-us/mcp/forum/mcp_prof-mcp_mcid
https://trainingsupport.microsoft.com/en-us/mcp/forum/mcp_prof-mcp_inquiry
--please don't forget to Accept as answer if the reply is helpful--