The alarm isn’t available in Australia, and even if it was, modes are useful even without the alarm.
Please make it so the Echo skill can change between Disarmed, Home and Away modes by voice. I understand this will require a pin. Perhaps it could be limited to Echo Show devices, by saying “open Ring” and being displayed with a Modes dashboard.
Whichever way you do it, just please do it. I have 7 cameras and no alarm. It would be nice to be able to conveniently change modes, as I do household chores without having to trigger my system.