Azure FunctionApps list not returning functions

On my Azure account, I have setup 2 FunctionApps as myself. I am doing this via the Contributor role. I can view it via the CLI:

az functionapp list --resource-group <my subscription>

I am trying to do the same via a Scala app. The identity has both the Contributor and the Reader roles, so it should be able to read all resources.

      val profile = new AzureProfile(params.azureTenantId, params.azureSubscriptionId, AzureEnvironment.AZURE)
      val credential = params.getCredential()
      val azure = AzureResourceManager.authenticate(credential, profile).withSubscription(params.azureSubscriptionId)

When looking for VMs or VPCs, I get return values. However, when I try to do the same with FunctionApps, I get an empty list. I am expecting the same results as the CLI call:

      val test = azure.functionApps().list().asScala.toList
      logger.error("Test length is "+test.size)

In this case, I end up with an empty list. Both the CLI and the Scala app are using the Contributor / Reader roles, but the Scala app is not returning values.

Am I missing something?

I used the functionApps = azure.functionApps().listByResourceGroup(resourceGroup) function in the Scala code to get the list of Azure Function Apps.

I have assigned the Reader role to the Service Principal for my Resource Group.

I added the AZURE_CLIENT_ID, AZURE_TENANT_ID and AZURE_CLIENT_SECRET in system environment variables to use DefaultAzureCredential.

KamApp.scala :

import com.azure.identity.DefaultAzureCredentialBuilder
import com.azure.resourcemanager.AzureResourceManager
import com.azure.core.management.profile.AzureProfile
import com.azure.core.management.AzureEnvironment
import scala.jdk.CollectionConverters._

object KamApp {
  def main(args: Array[String]): Unit = {
    val tenantId = "<TenantID>"
    val subscriptionId = "<SubscriptionID>"

    val profile = new AzureProfile(tenantId, subscriptionId, AzureEnvironment.AZURE)
    val credential = new DefaultAzureCredentialBuilder().build()

    val azure = AzureResourceManager
      .authenticate(credential, profile)
      .withSubscription(subscriptionId)

    val resourceGroup = "<resourceGroupName>"

    try {
      val functionApps = azure.functionApps().listByResourceGroup(resourceGroup).asScala.toList

      if (functionApps.isEmpty) {
        println(s"No FunctionApps found in resource group: $resourceGroup")
      } else {
        println(s"Function Apps in $resourceGroup:")
        functionApps.foreach(app => println(s"- ${app.name()} (${app.regionName()})"))
      }
    } catch {
      case e: Exception => e.printStackTrace()
    }
  }
}

build.sbt :

libraryDependencies ++= Seq(
  "com.azure.resourcemanager" % "azure-resourcemanager" % "2.37.0",
  "com.azure" % "azure-identity" % "1.10.0",
  "ch.qos.logback" % "logback-classic" % "1.4.14"
)

Output :

I successfully retrieved the list of Azure Function Apps using Scala as shown below.