Selling tech behind an app that didn’t take off

I developed a marketplace app that sadly didn't gain traction. However, I believe the underlying technology, including the UI and server code, might still hold value for someone with a marketplace idea or business. I listed the app on Acquired, but so far, I haven't received any interest, most likely cuz they are looking for businesses, not tech. Any advice on how (or if) a mobile app's technology can be sold in the market? I’d love to find a new home for this project, I think it has potential.