Looking at awsx vpc package
This document mentions about a natgateway strategy, (https://www.pulumi.com/docs/guides/crosswalk/aws/vpc/
However this doesn't seem to be available in the package, only fields found regarding nats are numberOfNatGateways.
Am I looking at the wrong place?
AWS Virtual Private Cloud (VPC)
Pulumi Crosswalk for AWS provides simple, out of the box VPC functionality that follows widely accepted best practices.