Screen Time "More Time" requests not coming

How do I set up Screen Time on my daughter’s Mac to notify me when she wants more time?

When she asks for more time, I never get a notification, either on my iPhone or my Mac. even though I am set up as Organizer in Family Sharing. I am logged into my iCloud ID and her machine is logged in to hers. I have wandered through the settings and Googled for answers, but it remains a mystery.

Any ideas?