Get-AzSqlDatabase -ExpandKeyList doesn't seem to work

### Description

When I run the command
`(Get-AzSqlDatabase -ServerName MyServer -DatabaseName MyDatabase -ResourceGroupName MyResourceGroup -ExpandKeyList).EncryptionProtector`
TDE is enabled on the database to Customer-managed keys, And I can see it enabled via the portal, but can not see it when I run the command these are blank
Identity :
EncryptionProtector :
Keys :

### Issue script & Debug output

```PowerShell
No Error
these have no value
Identity :
EncryptionProtector :
Keys :
```

### Environment data

```PowerShell
Name Value
---- -----
PSVersion 7.3.3
PSEdition Core
GitCommitId 7.3.3
OS Microsoft Windows 10.0.19044
Platform Win32NT
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0
```

### Module versions

```PowerShell
PS C:\> Get-Module Az*

ModuleType Version PreRelease Name
---------- ------- ---------- ----
Script 2.12.1 Az.Accounts
Script 4.5.0 Az.Sql

PS C:\> Get-InstalledModule AZ

Version Name Repository
------- ---- ----------
9.6.0 Az PSGallery
```

### Error output

```PowerShell
No Error, Does not show the return info like in example 4 from
https://learn.microsoft.com/en-us/powershell/module/az.sql/get-azsqldatabase?view=azps-9.6.0
```

Start by reproducing Get-AzSqlDatabase -ExpandKeyList with the reported Az.Sql 4.5.0 and customer-managed TDE setup, then compare its output with example 4 in the linked documentation. Trace how the cmdlet returns EncryptionProtector, Identity, and Keys; done means these fields are populated consistently for the reported database scenario.

Written by the indexing model from the issue text.