Powerwall OS upgrade run just like the software updates on a Tesla vehicle. Not everyone gets the latest update.
For example, I'm still on 1.6.0, and I inquired when I would get 1.7.0 and they said that the system will push it out, but not everyone will get the latest 1.7.0, however they see a 1.9 coming soon, and eventually a 2.0.
They also said that since the gateway/powerwall need a reboot for the new PowerwallOS to take effect, it will not install when providing power to the house, only when it's idle.