Trigger save of a FileDocument in a DocumentGroup?

I have a DocumentGroup working with a FileDocument, and that's fine. However, when someone creates a new document I want them to have to immediately save it. This is the behavior on ipadOS and iOS from what I can understand (you select where before the file is created).

There seems to be no way to do this on macOS? I basically want to have someone:

1. create a new document
2. enter some basic data
3. hit "create" which saves the file
4. then lets the user start editing it

(1), (2), and (4) are done and fairly trivial. (3) seems impossible, though...?

This really only needs to support macOS but any pointers would be appreciated.