Is there any way to associate nic with appgateway backendpool?

[shyoon-devops]

What problem are you facing?

Is there a way to associate a NIC with an App Gateway backend pool?
I'm trying to associate a NIC with an App Gateway backend pool using NetworkInterfaceBackendAddressPoolAssociation as follows:

apiVersion: network.azure.upbound.io/v1beta1
kind: NetworkInterfaceBackendAddressPoolAssociation
metadata:
  name: crossplane-quickstart-nic-backend-address-pool-association
spec:
  forProvider:
    
    backendAddressPoolId: /subscriptions/xxxxxxxxxxxxxxxxxx/resourceGroups/prd-uset-gasp-admin-rg/providers/Microsoft.Network/applicationGateways/xxxxxxxxxxx/backendAddressPools/xxxxxxxxxxx
    ipConfigurationName: default
    networkInterfaceIdRef:
      name: crossplane-quickstart-nic
  providerConfigRef:
    name: workload-identity-provider-config-prod

However, it didn't work as expected (see image for details).

What could help solve your problem?

Is there any known way to successfully associate a NIC with an App Gateway backend pool?