ansible.azure.automation/roles/azure_bp/tasks/absent.yml

---
- name: Delete backendpool
  azure_rm_resource:
    ad_user: "{{ azure_ad_user | default(omit) }}"
    password: "{{ azure_password | default(omit) }}"
    subscription_id: "{{ azure_subscription_id | default(lookup('env', 'AZURE_SUBSCRIPTION_ID')) }}"
    client_id: "{{ azure_client_id | default(lookup('env', 'AZURE_CLIENT_ID')) }}"
    secret: "{{ azure_secret | default(lookup('env', 'AZURE_SECRET')) }}"
    tenant: "{{ azure_tenant | default(lookup('env', 'AZURE_TENANT')) }}"
    url: "https://management.azure.com/subscriptions/{{ subscription_id }}/resourceGroups/{{ resourcegroup }}/providers/Microsoft.Network/loadBalancers/{{ bp.lbname }}/backendAddressPools/{{ bp.name }}?api-version=2021-02-01"
    state: "absent"
  register: deletebp
...