Hi, looking at the built-in packages, there is strong evidence that a modern UI framework written in TypeScript exists. It would be nice to let community packages access it for UI customizations (e.g. adding toolbar panels), as for now we are forced to use the msfs 2020 framework which looks outdated.
The Avionics SDK is actually available both on github and as npm packages. It would be awesome to have the same experience with the UI framework.