I found Apple ID and added Desktop to the choices and it looks like the desktop is just appearing. However, I assume iCloud Sync, once I know how to find it, should update everything else (like my Mail, which shows zero messages), and also recreate my wife's account. Yes? No?
Assuming it was synched in your old system, YES!
"All you've got to do is own up to your ignorance honestly, and you'll find people who are eager to fill your head with information" --Walt Disney