Thanks for passing that info along. Seems par-for-the-course with Meraki, though - making weird excuses on why something isn't possible, while other competing software and systems seem to manage just fine (e.g. ManageEngine MDM has the ability to enforce and manage Android OS updates).
Not to mention the actual documentation from Android on how to create a policy for Organization Owned and Work Profile devices on system updates for EMMs - Manage system updates | Android Developers.
Having the ability to manage the update profiles would at least give compliance assurance to device owners.
Per Android's dev documentation for EMMs:
A device owner can control when updates are installed by setting a local system update policy for a device. The system update policy can be one of three types:
Installs system updates as soon as they become available (without user interaction). Setting this policy type immediately installs any pending updates that might be postponed or waiting for a maintenance window.
Installs system updates during a daily maintenance window (without user interaction). Set the start and end of the daily maintenance window, as minutes of the day, when creating a new windowed policy.
Postpones the installation of system updates for 30 days. After the 30-day period has ended, the system prompts the device user to install the update.