@Jonny Fox Thanks for posting in our Q&A.
Currently, intune doesn't have the setting to set the timezone/region. Please understand that what intune can do to Android devices is based on what Android MDM provides.
For Android device, I did not find this feature enabled in the Android MDM article. So, it is suggested to feedback in Android support.
Thanks for your understanding.
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.