Uno Platform maintainer here - We're maintaining production apps ourselves, like NuGet Package Explorer [1], or Uno Calculator [2], and many third-party apps are in production, with some shown in case studies [3]. You can also find some other tech Wasm demos [4] on our repo.

1: https://nuget.info

2: https://calculator.platform.uno

3: https://platform.uno/case-studies

4: https://github.com/unoplatform/uno#live-webassembly-apps

I just learned about this thing today, so take this with a grain of salt: there are links out to two apps, Simple Calc and Tube Player, at the bottom of the home page. These are tutorials and source code, not a finished product. There is also a "gallery" on the top right, and you can play with the UI components rendered in the web: https://gallery.platform.uno/.