Sorry for the slow response, I missed your post.
It is possible to develop web-based applications using Suneido as the server and database (with RackServer). My company does this for some applications. But then you cannot use Suneido’s application framework. You just program in HTML, CSS, JavaScript on the front end. You can use things like the Razor templates on the Suneido backend.
Unfortunately, Suneido has no support for mobile applications. You could use Suneido for the backend database.
Suneido works fine on Windows 10.
Best wishes!