Is there a way to specify the timezone?

Automatic updates for time zones is automatically controlled by the device settings when the device enters a new time zone.

An IT Admin may control the time zone if the end user is allowed to make changes to the times zones within the profiles. (Profile > Android Enterprise / Android (Legacy) > System > Automatic Date and Time).

Knox Manage accounts using Android Enterprise specify a specific time zone for all the enrolled devices. (Profile > Android Enterprise > System > Select Time Zone > Time Zone)