Azure disk encryption

I have a VM with 4 disk encrypted with SSE with PMK & ADE. I added two additional disk to increase the storage pool when I follow instruction -

$KVRGname = 'MyKeyVaultResourceGroup';
$VMRGName = 'MyVirtualMachineResourceGroup';
$vmName = 'MySecureVM';
$KeyVaultName = 'MySecureVault';
$KeyVault = Get-AzKeyVault -VaultName $KeyVaultName -ResourceGroupName $KVRGname;
$diskEncryptionKeyVaultUrl = $KeyVault.VaultUri;
$KeyVaultResourceId = $KeyVault.ResourceId;

Set-AzVMDiskEncryptionExtension -ResourceGroupName $VMRGname -VMName $vmName -DiskEncryptionKeyVaultUrl $diskEncryptionKeyVaultUrl -DiskEncryptionKeyVaultId $KeyVaultResourceId;

From https://video2.skills-academy.com/en-us/azure/virtual-machines/windows/disk-encryption-windows#enable-encryption-on-a-newly-added-data-disk. The virtual machine did not reboot on its own. I tried running from powershell ISE and native shell in Azure. I rebooted the machine and two disk still shows only SSE with PMK.

My KeyVault has two encryption not sure which one was used by consultant when it was initially set thus unable apply above changes from portal GUI interface