Hello @Rajesh Swarnkar,
Microsoft Entra ID tenants are always tied to the identities that administer them. If your goal is to transfer the ownership/administrative control of the tenant from one MSA to another MSA, it is possible by assigning the new MSA account Global Administrator permissions.
You can do this by inviting the new MSA account into the tenant as a guest user, and then granting it Global Administrator privileges. Once the new MSA has full administrative access, you can remove the old MSA account from the tenant if required. This effectively transfers the tenant administration/ownership from one MSA account to another.
Refer the documentation on how to add a guest user and send an invitation: https://learn.microsoft.com/en-us/entra/external-id/b2b-quickstart-add-guest-users-portal
Recommended approach: Always ensure you have at least two Global Administrator accounts in the tenant to avoid tenant lockout scenarios.