Ah the internet of infected things. Everything a mash up of open and closed source, old and new, then abandoned by the manufacturer after a few years for the next shiny.
Probably Linux based, wait to be taken over by a few botnets…
What is needed is an open, standardized hardware platform. You should be about to flash on the IoT OS of your choice that will be kept up to date.
I want hardware platforms standardized and autodiscoverable. These things need to get updates after the manufacturer ceases to care. Also, these hardware manufacturers can be terrible at software. It should be like PCs. I think that is end point anyway. It’s just unmaintainable any other way, even if these are intended to be e-waste after only a few years.