@Marvin how can I define a parent deployment that kicks off a bunch of child flow runs from different deployments and uses the child flow run results in the parent flow run?

It sounds like you need to create a deployment for each child flow and assign them to a work queue. Then, you can use the Prefect API to query the results of the child flow runs from the work queue using the work queue name. For more information on deployments, you can check out the Prefect documentation at https://docs.prefect.io/tutorials/deployments/ and https://docs.prefect.io/concepts/deployments/.

meh