When can we expect azurerm to provide postgresql flexible server backup since its in preview in MS?

we need ASAP in terraform to have data protection backup like it is for a single server.

for now for single we can create policies:

resource “azurerm_data_protection_backup_policy_postgresql”

we can create a backup for it:
resource “azurerm_data_protection_backup_instance_postgresql”

we need the same for flexible server, since single server will be depracated anyway.