Welcome to TPG Community!
Even though you are not experiencing any issues with your service, we can still upgrade the firmware of your modem to make sure that it keeps running smoothly.
The request has been sent and will provide you with the update as soon as it becomes available.
Our network Engineers was not able to detect your modem, which is why they weren't able to push to upgrade its firmware.
Could you factory reset the modem? The settings that you've changed will go back to its default, but it will automatically authenticate with the NBN server. Please let us know once done and will push for an update again.