Has anyone used pulumi to deploy infrastructure on multiple accounts? (with aws organizations) I need to do so I can use my route 53 NS servers from my root account and use them on other accounts that represent different workloads (development, staging, production) Any help would be appreciated

Yep. If you want to deploy the same stuff to different accounts, use stacks and put the creds / profiles in your stack config. If you want to deploy different stuff to different accounts within a single account, then you need multiple instances of the AWS provider class.

We have successfully done this with a stack per account (which for us matched a stack per environment). Means we can keep a nice logical divide going