We can, Swing is just another library that we can wrap on.
Yet i agree that this project in particular is not much of intereset for us. This kind of projects seem to be losing steam to web in general and webassembly in particular.
In fact, there are a couple of other projects that allow to build Android apps and web apps with javafx
Gluon has introduced a technology preview of JavaFX running a single codebase across PC, mobile, and now client web. These fully standalone web clients do not require any server-side portion, making them suitable for serverless hosting.