How do I register undo actions for menu commands while preserving built-in view's undo management?

I've got a single-window app whose main ContentView is a table of records. It has some menu commands, defined in my App file, that allow record-level operations (add, delete, process, etc). It also uses some framework-provided editing views (i.e. TextFieldView) for individual fields on each record.

I'm having a lot of trouble implementing undo/redo. The menu commands don't have access to the Environment to obtain the undoManager there. The undoManager is nil during onAppear of the ContentView, so I can't set it into my view model before running some user-initiated action on the view itself. If I wire up custom Undo/Redo menu items with my own UndoManager, the TextFieldView undo no longer works. I even tried getting at the underlying NSWindowDelegate to provide my own UndoManager in windowWillReturnUndoManager, but that never gets called.

What's the correct pattern to use here?