How would I limit per day usage for user with standard access rights to X minutes on macos 10.15?

I have account with administrative access on home computer, naturally. How would I trim to family member with standard rights usage to 30 minutes per day on macOS 10.15 (in screen time or whatever.)

UPD20210407 I've filed FB9071215 with Apple to untether that functionality from family sharing setting.


Solution 1:

One solution would be to create child iCloud accounts for each of the individual users.