Yes, you can use Custom Extension with through an interactive CLI to create template extension.

I'm working hard to improve the utilities and make the connection between wasm build and pyxis core system.

I'wont use wasm to build as a core, base system, but i will support in extension.

Still, I was not uploaded a react build extension system, but if you want to use this, you can upload a zip extension file.(which is created for pyxis)

* sorry for my bad english XD