Sometimes just wait

10 minutes is nothing special. Happened in this project, when I was deleting the keyvault.

azurerm_key_vault.kv: Still destroying... [id=/subscriptions/xxxxxxx-xxxx-xxxx-xxxx-...KeyVault/vaults/mysecurevault1234, 10m0s elapsed]
azurerm_key_vault.kv: Destruction complete after 10m7s