ServicePrincipal StartDate and EndDate not displaying Using Graph API In Power Shell

Hi,

I am trying to get list of SPNs that are going to expire soon. Using Graph API  I am executing below powershell script.

I am getting output appid and name always but StartDate and EndDate are not displaying for few of SPN.

Can you please help how to get it ?

Below is Power shell script I am using:

$TenantId = "*************"
$ClientId = "*************"
$ClientSecret = "*************"

$Body = @{
    'tenant' = $TenantId
    'client_id' = $ClientId
    'scope' = 'https://graph.microsoft.com/.default'
    'client_secret' = $ClientSecret
    'grant_type' = 'client_credentials'
}


$Params = @{
    'Uri' = "https://login.microsoftonline.com/$TenantId/oauth2/v2.0/token"
    'Method' = 'Post'
    'Body' = $Body
    'ContentType' = 'application/x-www-form-urlencoded'
}

$AuthResponse = Invoke-RestMethod @Params

$Headers = @{'Authorization' = "Bearer $($AuthResponse.access_token)"}

$method = "GET"

$uri2 = "https://graph.microsoft.com/v1.0/applications/{Id}"

$query2 = Invoke-WebRequest -Method $method -Uri $uri2  -ContentType "application/json" -Headers $Headers -ErrorAction Stop


$query2.content | ConvertFrom-Json | select appId,displayName,@{l="SecretExpiryDate";e={$pwdcreds2.passwordCredentials.endDateTime}}

$pwdcreds2.passwordCredentials

I have another Powershell script it is giving startdate and enddate for same SPN but the problem is my Org is not allowed to fetch APP details from Azure AD due to security guidelines.

$ServicePrincipalIds = Get-AzADServicePrincipal | Where {$_.DisplayName -like '*'}

foreach($ServicePrincipalId in $ServicePrincipalIds)
{
$ServicePrincipalInfo = Get-AzADSpCredential -ObjectId $ServicePrincipalId.Id
$ServicePrincipalInfo
}