There are 2 repositories under pulumi-policy topic.
An example AWS policy pack for Pulumi CrossGuard.
A project that demonstrates how you can use Pulumi CrossGuard to evaluate AWS IAM policies before deployment and prevent policies from being created that do not pass IAM Access Analyzer Policy Validation.
An example using Pulumi CrossGuard for policy as code to ensure a database password is secret and will be encrypted in the Pulumi stack state file.