Hi Anshul Salvi,
Welcome to Microsoft Q&A forum.
As I understand, you could not open Azure MySQL Flexible Server in Azure Portal.
Could you please let us know the configuration details of the server?
Also refer to similar Q&A post if this helps: https://learn.microsoft.com/en-us/answers/questions/1533455/not-able-to-create-mysql-flexible-server-replica-i
Please try to access through Azure CLI if the server shows available.
Thanks