You can use the Metadata Snaps, with Asset Type set to project and Asset Path set to the Project Space level, org/project_space.
Use a SnapLogic Read to read an existing Project Space’s metadata, then use a SnapLogic Create.
(ignore the fact that I labelled my Snaps “project” as I copied my Create project pipeline and just changed the asset paths)
The Project Space will be created with only the /shared subdirectory.
