There is pretty much no commitment to support upgrades to newer versions of the Android OS or firmware updates related to the hardware integration. Up to this point, I don't believe any of us have received any sort of software / firmware updates for these newer EC Offroad units. It sounds like there have been 1 or more hardware revisions and based on comments in this thread, there have been a few software / firmware tweaks (for example, the startup splash screen now shows an EC Offroad graphic instead of a random Toyota or Lexus logo). I have been meaning to send them a message asking if there are updates that can be installed on mine; if nothing else I would prefer a generic EC Offroad graphic rather than randomly seeing the Toyota or Lexus logo while booting (the Toyota logo is fine, but the Lexus logo makes it feel like an unfinished product). So if you purchase one, go in with the assumption that what is delivered to you is the final product.
Several of us posting here started with EC Offroad's prior hardware version and ran into some issues, some of which were apparently specific to USA spec Land Cruisers. There was some support to resolve issues with firmware updates, but support for USA specific issues was pretty much a no-go. The pandemic situation made it even more difficult to deal with as the manufacturer would have needed to travel to resolve the USA specific issues.