Private Cloud firewall cluster, redundant across multiple AZ in AWS. Is anybody doing this for production?

We currently have Checkpoint cluster in a single AZ, and if you use IPsec tunnels, you can’t deploy Checkpoint cluster in two AZ, unless you don’t use IPsec. We have around 300 VM’s there in different VPC’s isolated with TransitGateway quite a bit traffic going on there. Just wondered, what other people are using out there?