Seeking advice on coordinating multiple Waypoint deploys to multiple AWS accounts

I’m looking to leverage Waypoint to setup sandbox environments which span multiple AWS accounts. I’d think of it as sort of a “composite” Waypoint project which involves multiple microservices and supporting infrastructure such as DynamoDB. So far I’m using a Bash scripts along with Waypoint hooks to accomplish this but would like to evolve to something more robust.

Has anyone attempted something similar and if so, can you share patterns that have worked well?