Set up company-owned iOS device management – Google Help

Note: We strongly recommend that you add devices through a certified reseller and Apple Business Manager or Apple School Manager. When you manually add a device to Apple Business Manager or Apple School Manager, users have the option to leave remote management for 30 days after they enroll. If a user leaves, the device is removed from the company-owned inventory within 24 hours and settings …

https://support.google.com/a/answer/9904735?hl=en