Accessing Azure Storage Accounts with Selected Network Enabled

As per the requirements, I need to Enable Firewall with Selected Network ON for Azure Storage Accounts. But when I do the same along with adding all required IPs, Azure Function App and Azure Data Factory is going down.

Currently the VNET is unavailable and cannot be created. Managed Identity is not an option as Contributor role unavailable.

Is there a way to to configure the Data Factory and Function Apps after enabling FireWall with selected networks ON for Azure KeyVault and Azure Storage Accounts.

Thanks.