Azure Logic App Workflow uses integration service environment. Using integration service environment in a virtual network unlocks advanced Logic Apps networking and security features and provides you with greater control over your network configuration.
Integration service accounts are being discontinued through Azure so they can no longer be provisioned for Logic Apps.
In Terraform -
References:
https://learn.microsoft.com/en-us/azure/logic-apps/
https://learn.microsoft.com/en-us/azure/logic-apps/connect-virtual-network-vnet-isolated-environment
https://registry.terraform.io/providers/hashicorp/azurerm/3.40.0/docs/resources/logic_app_workflow#integration_service_environment_id