~$ cat /etc/chromium/policies/managed/ubo-policies.json
{
"ExtensionManifestV2Availability": 2
}
Will save you for another year.
Will save you for another year.
Under the Chrome key, create a DWORD value named "ExtensionManifestV2Availability" with hex value 2.
Restart Chrome. If successful, you'll notice the ExtensionManifestV2Availability entry with value 2 in chrome://policy and the settings page will mention "managed by your organization".