Since August 30th 2020, Win3x.Org has hosted an entirely new part dedicated for the hardware (only motherboards at the moment): http://www.win3x.org/uh19
Related threads were created in different websites, such as vogons.org in English or dosreloaded.de in German, and of course Win3x.Org but in French for that latter. Oddly, there wasn't thread in English here, while it definitely targets an international audience.
That's why I publish that subject: it could be used to suggest any idea, to report problems,... If you want to improve the motherboards content, there are two dedicated forums: Add a motherboard and Update an existing motherboard.