No matter how you like to participate in developer communities, Pulumi wants to meet you there. If you want to meet other Pulumi users to share use-cases and best practices, contribute code or documentation, see us at an event, or just tell a story about something cool you did with Pulumi, you are part of our community.

Pulumi Community

You don't wait in your code. In fact, you can't wait in your code, since your code finishes before any resources are created.
The various validation resources do the waiting for you.
This one for certificates: <https://www.pulumi.com/registry/packages/aws/api-docs/acm/certificatevalidation/>

You don't need to wait for Route53 records at all. That's already done within the Route53 resources.