Have you setup the metaflow-service/metaflow-ui already or just running locally?
The sandboxes are more of a demo tool to show what hosted Metaflow looks like, but you’d have to set Metaflow UI, Metaflow Service to get that experience, along with Argo/Airflow if you’re planning to use either of those. You can also use AWS Batch or step functions for scaling out to bigger workloads.
We have a terraform module here:
https://github.com/outerbounds/terraform-aws-metaflow that should help with a Metaflow setup, let us know if you run into any troubles with this!