StatefulRuleGroupOverride - AWS Network Firewall

Terraform Providers AWS
1

Hello,

Looking to apply AWS managed firewall groups to my Network Firewall in ALERT mode. It seems like AWS have released the option:

But cannot see this option anywhere in:

https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/networkfirewall_rule_group

Dont know if anyone has any workaround or options for this use case?