I foolishly bought this H68K-V2 without knowing enough about it or OpenWrt. Of course it is not supported. The (forked) image it shipped with was super old by the time I got round to playing with it last week so I flashed it with an image built by C-Prime90 https://github.com/C-Prime90/openwrt/releases
I spent most of yesterday trying to build an image based the latest stable release (v23.05.5) but I think I have failed because I can't find an image file that looks like the complete build. The build apparently ran without any error but I'm new at this so I'm not sure. Here are some of the img files my build produced, none of which look like an OS image. Any advice is welcome.
I do not know what the process by which a device to becomes officially supported. I'd like to start with something more reasonable like building an image that works.
BTW, "You could ask c-prime90 to help you with official openwrt support for the device" is not a question.
It appears you are using firmware that is not from the official OpenWrt project.
When using forks/offshoots/vendor-specific builds that are "based on OpenWrt", there may be many differences compared to the official versions (hosted by OpenWrt.org). Some of these customizations may fundamentally change the way that OpenWrt works. You might need help from people with specific/specialized knowledge about the firmware you are using, so it is possible that advice you get here may not be useful.
Ask for help from the maintainer(s) or user community of the specific firmware that you are using.
Provide the source code for the firmware so that users on this forum can understand how your firmware works (OpenWrt forum users are volunteers, so somebody might look at the code if they have time and are interested in your issue).
If you believe that this specific issue is common to generic/official OpenWrt and/or the maintainers of your build have indicated as such, please feel free to clarify.