In the grand history of hardware, the RT3090BC4 V20A is a humble veteran—a small piece of software that, for millions of people, was the invisible bridge to the rest of the world.
Look at the Hardware ID in Device Manager (Details tab > Hardware Ids). Post it in a tech forum (e.g., Reddit r/techsupport or TenForums.com) along with your exact Windows build number. With the correct INF edit, even the picky "BC4 V20a" can be forced to work.