Nest Cam (battery) firmware not updated in three years(?)

[flynh]

I have installed 3 Nest Cam (battery) three years ago. When i inspect the device information for each in Google Home app on android, I see what is shown below. As highlighted below the updated status is unknown. Other devices (e.g. Nest Themostat) on my home network shows recent updates; but all nest batterycam shows Updated status to be unknown. Is this a false alarm? Should I be worried that the cameras have never been updated in three years?

    Model: Nest Cam (battery)

    Device ID: xxxxxxxxx

    Serial no: xxxxxxxx

    Software version: nq-user-1.75

     OPENMASTER xxxx release-keys

    stable-channel stable-channel

    Updated: Unknown

    IP: 192.xxx.xx.xx

     last contact: Just Now

[MplsCustomer]

@flynh 

We've had a battery camera for almost 4 years--plugged in with the optional power cable.

Our Device information also says "Updated: Unknown", but I don't know if Google Nest maintains an updated date; our 2nd gen wired camera says the same thing.

Our Software version says "nq-user 1.75 OPENMASTER 440524 ...", the same value that is shown for our 2nd gen wired camera.

Our other cameras and doorbells are 1st gen.

Our Nest Hubs do not have an "Updated" field.