Short answer: Dedicated devices are userless
https://developers.google.com/android/work/requirements/fully-managed-device --The fully managed device solution set is intended for company-owned devices. Fully managed features give IT admins management of an extended range of device settings and extra policy controls not available in the work profile solution set.
https://developer.android.com/work/dpc/dedicated-devices--Dedicated devices (formerly called corporate-owned single-use, or COSU) are fully managed devices that serve a specific purpose.
