Failover Lambda Script for NGFWv and TGW

Hi,

I've been looking for articles specifically for Cisco NGFWv to failover between two NGFWv in two AZs when using VPC attachment to Transit Gateway but I haven't any.

Do you gents have any resources? I know there's no need to write any lambda function when using VPN attachments but not a lot of customers want to cause bottleneck for ingress and egress traffic in their AWS environment.

Would appreciate your response.