Well, a gh repo goes beyond what fits in one or two sentences. I can clone, run, inspect and usually use to learn something from those.
Now if this was a blogpost by someone making, say, disposable video-enabled teledildonics, we'd go beyond "this exists"...
For the most part, when working with hardware, I find this to be quite typical. A spec sheet, if one is lucky maybe an application note tackling a tangentially similar problem and thats usually it. Unfortunately open source hardware tends to be much less of a thing than software.