Hi
Rakesh Dakornarayan Chandra •,
Welcome to Microsoft Q&A forum and thanks for using Azure Services.
As I understand, you are not able to find Azure MySQL Flexible Server in Azure Portal after migration.
We are sorry about the inconvenience you are facing.
Please try to execute Azure CLI command to check status of the server like below:
az mysql flexible-server db list --resource-group
az mysql flexible-server db show [--database-name] [--ids] [--resource-group] [--server-name] [--subscription]
Let us know if the server details show up. If not, please raise support case for immediate attention and investigation.
Thanks